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      Toward an Understanding of Disengagement from HIV Treatment and Care in Sub-Saharan Africa: A Qualitative Study

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          Abstract

          Norma Ware and colleagues conducted a large qualitative study among patients in HIV treatment programs in sub-Saharan Africa to investigate reasons for missed visits and provide an explanation for disengagement from care.

          Abstract

          Background

          The rollout of antiretroviral therapy in sub-Saharan Africa has brought lifesaving treatment to millions of HIV-infected individuals. Treatment is lifelong, however, and to continue to benefit, patients must remain in care. Despite this, systematic investigations of retention have repeatedly documented high rates of loss to follow-up from HIV treatment programs. This paper introduces an explanation for missed clinic visits and subsequent disengagement among patients enrolled in HIV treatment and care programs in Africa.

          Methods and Findings

          Eight-hundred-ninety patients enrolled in HIV treatment programs in Jos, Nigeria; Dar es Salaam, Tanzania; and Mbarara, Uganda who had extended absences from care were tracked for qualitative research interviews. Two-hundred-eighty-seven were located, and 91 took part in the study. Interview data were inductively analyzed to identify reasons for missed visits and to assemble them into a broader explanation of how missed visits may develop into disengagement. Findings reveal unintentional and intentional reasons for missing, along with reluctance to return to care following an absence. Disengagement is interpreted as a process through which missed visits and ensuing reluctance to return over time erode patients' subjective sense of connectedness to care.

          Conclusions

          Missed visits are inevitable over a lifelong course of HIV care. Efforts to prevent missed clinic visits combined with moves to minimize barriers to re-entry into care are more likely than either approach alone to keep missed visits from turning into long-term disengagement.

          Please see later in the article for the Editors' Summary

          Editors' Summary

          Background

          The human immunodeficiency virus (HIV) infects cells of the immune system, destroying or impairing their function. As the infection progresses, the immune system becomes weaker, and the affected person becomes more susceptible to life-threatening infections. Over the past three decades, 25 million people have died from HIV, and according to the World Health Organization, in 2011, there were roughly 34.2 million people living with HIV, over 60% of whom lived in sub-Saharan Africa. Although HIV cannot be cured, the virus can be suppressed by combination antiretroviral therapy (ART) consisting of three or more antiretroviral drugs. ART controls viral replication and strengthens the immune system, allowing the affected person to fight off infections. With ART, HIV can be managed as a chronic disease: people living with HIV can live healthy lives as long as they take antiretroviral drugs regularly for the rest of their lives.

          Why Was This Study Done?

          Unfortunately, poor retention in HIV programs is a huge problem: a large proportion—30%–60% in some settings in sub-Saharan Africa—of people starting ART, are lost to follow-up and stop taking treatment. Few studies have looked in depth at the reasons why people with HIV in sub-Saharan Africa miss clinic appointments or even stop coming altogether. So in this study in Tanzania, Uganda, and Nigeria, the researchers did a qualitative analysis from the patients' perspective on the reasons for missing clinic visits. Qualitative research can use information-gathering techniques, such as open-ended interviews, to develop an in-depth understanding of human behavior and the reasons behind such behavior.

          What Did the Researchers Do and Find?

          The researchers indentified people to interview by using “tracking lists” from HIV/AIDS care clinics in the three countries—patient tracking by clinical trackers is increasingly used as a way to contact patients who have missed clinic appointments. The researchers included people in the study who had been tracked and contacted by clinic trackers, had been absent from the clinic for three months or more, and gave consent to be re-contacted by the researchers. The researchers interviewed participants, using their local language, on several topics, including their experiences of care at the clinic and of tracking, and the circumstances of missed appointments. The detailed accounts were transcribed, and then the researchers categorized the reasons for missing appointments into intentional and unintentional reasons.

          Eight-hundred-ninety patients in the three countries were tracked during the study period, but only 287 were located, of whom 91 participated in the study. Of the 91 participants, 76 were being prescribed ART, and 15 had not started treatment. The main unintentional reason for missing clinic visits was a conflicting demand on the patients' time, which was often unexpected and for complex reasons, such as caring for a dying relative, going to a funeral, or traveling to work. These reasons were often transient and changed over time. Intentional reasons were often related to dissatisfaction with the care received at the clinic, especially “the harsh treatment” they received from health workers, which typically referred to behavior perceived by patients to be rude. For example, participants reported being spoken to “roughly” or feeling that the clinic staff “didn't care.” Such behavior made patients feel hurt, humiliated, and angry, and reluctant to return to the clinic. The researchers found that, overall, disengagement from care appeared to be a process through which missed visits and subsequent reluctance to return over time eroded patients' sense of connectedness to care.

          What Do These Findings Mean?

          Absences from care will be inevitable over a lifetime course of treatment for HIV/AIDS. These findings indicate that absences may be unintentional as well as intentional, and that the reasons are complex and can change over time. Initial reasons for missing may disappear, leaving patients free, but reluctant, to return to care. Reasons for reluctance include shame at having been absent and the anticipation of a negative response to return from care providers. Patient education for ART initiation in sub-Saharan Africa often includes stern warnings about the lifelong commitment beginning ART represents. Paradoxically, educational efforts intended to maximize the benefits of ART for patients may be driving some away from care. Therefore, efforts to prevent missed clinic visits coupled with strategies to minimize any obstacles to coming back to care are necessary to keep patients' missed visits from turning into long-term disengagement from treatment.

          Additional Information

          Please access these websites via the online version of this summary at http://dx.doi.org/10.1371/journal.pmed.1001369.

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          Most cited references 39

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          Patient Retention in Antiretroviral Therapy Programs in Sub-Saharan Africa: A Systematic Review

          Introduction In the half decade since the first large-scale antiretroviral treatment (ART) programs for HIV/AIDS were launched in sub-Saharan Africa, much attention has focused on patients' day-to-day adherence to antiretroviral (ARV) medications [1–3]. Long-term retention of patients in treatment programs, a prerequisite for achieving any adherence at all, has received far less attention. Perhaps because most large scale treatment providers have few resources available to track missing patients, most studies treat patient attrition as a side issue and focus solely on describing those patients who are retained. Moreover, adherence can be assessed over very short periods, whereas long-term retention requires, by definition, long-standing programs. Attrition from antiretroviral treatment programs is generally divided into four categories. The two most common are (1) the death of the patient—several studies have reported high rates of early mortality—and (2) “loss to follow-up,” a catch-all category for patients who miss scheduled clinic visits or medication pickups for a specified period of time. Some patients remain in care but stop taking ARV medications (3). Others transfer to other facilities and continue on ART (4). Treatment discontinuation raises some of the same concerns about drug resistance that incomplete adherence does and, even worse, negates much of the benefit sought by those implementing treatment programs. Patients with clinical AIDS who discontinue ART will likely die within a relatively short time [4]. High rates of attrition from treatment programs thus pose a serious challenge to program implementers and constitute an inefficient use of scarce treatment resources. In this study, we analyzed reported treatment program retention and attrition in sub-Saharan Africa in order to document the magnitude of the problem and help policy makers and program managers address the challenge of patient retention. Methods Definitions For this review, “retention” refers to patients known to be alive and receiving highly active ART at the end of a follow-up period. “Attrition” is defined as discontinuation of ART for any reason, including death, loss to follow-up, and stopping ARV medications while remaining in care. Transfer to another ART facility, where reported, is not regarded as attrition—patients who transfer are assumed to be retained. We accepted the varying definitions of loss to follow-up used by the respective studies. Many studies considered patients lost if they were more than 3 mo late for a scheduled consultation or medication pickup, but some studies used more or less stringent definitions ranging from 1 to 6 mo late for a scheduled consultation or medication pick-up. Inclusion and Exclusion Criteria Studies were included in the review if they reported the proportion of adult HIV-1 patients retained in highly active ART programs implemented in service delivery (nonresearch) settings in sub-Saharan Africa. All patients who initiated ART had to be included in the report, not just those still in care at the time of censoring (i.e., only intention-to-treat analyses were included). Clinical trials, including Phase 3 trials, were excluded, although some subjects of reviewed studies transferred into the treatment program from a clinical trial. A median follow-up period of at least six full months (26 weeks) was also required. Studies that reported mortality but not other categories of attrition and studies that reported only on-treatment analyses, or where we were unable to determine whether the study was intention-to-treat or not, were also excluded. A few of the reviewed studies did not differentiate between adult and pediatric patients; those that considered only pediatric patients were excluded. Search Strategy To identify eligible studies, we conducted a systematic search of the English-language published literature, gray literature (project reports available online), and conference abstracts between 2000 and 2007. The search included Ovid Medline (1996 to July 2007), EMBASE (inception to July 2007), ISI Web of Science (August 2002 to July 2007), the Cumulative Index to Nursing & Allied Health Literature (2002 to July 2007), and the Cochrane Database of Systematic Reviews (inception to second quarter 2007). We also searched the abstracts of the conferences of the International AIDS Society (inception to 2006), the Conference on Retroviruses and Opportunistic Infections (inception to 2007), the HIV Implementers' Meetings (2006–2007), and the South African AIDS Conference (2005–2007). The bibliographies of five recently published reviews of treatment outcomes, mortality, or ARV adherence in resource-constrained settings were also searched [1–3,5,6]. Our search strategy combined the terms “antiretroviral” and “Africa” or “developing countries” with each of retention/attrition/loss to follow-up/mortality/evaluation/efficacy. When more than one source reported on the same cohort of patients, the source containing the most detailed data about retention and attrition or the longest follow-up period was selected for the review. Although non-English databases were not searched, English-language abstracts of non-English papers identified in our search were included. Eligible studies were identified by the first author (SR) and eligibility confirmed by the other authors (MF and CG). It should be noted that the Antiretroviral Therapy in Low Income Countries (ART-LINC) collaboration has recently reported aggregate 1 y mortality and loss to follow-up rates for 13 cohorts in sub-Saharan Africa [5]. Some of the patients in these cohorts are included in the studies reviewed here. To avoid duplication, findings from the ART-LINC cohorts were not included in this analysis but are noted in the discussion. Data Analysis Most studies reported patient attrition at months 6, 12, and/or 24 after treatment initiation. We therefore used these same intervals in this analysis. For papers that reported on intervals other than 6, 12, or 24 mo, we classified the reported attrition rate using the nearest time point. If the report did not list attrition rates by time, but did list a median duration of observation, we estimated attrition at the 6, 12, or 24 mo interval closest to the reported observation period. In some cases, follow-up periods and/or retention rates were calculated by the authors using data provided in the article or extracted from figures (e.g. Kaplan-Meier survival curves). Where appropriate, we calculated weighted averages for demographic features of the cohort participants or other factors related to the studies. For proportions, averages were weighted by the inverse of their variances [1 ÷ (p × [1 − p] ÷ n), where p is the proportion and n is the sample size]. Because we did not have the individual patient data for continuous variables nor their standard deviations, we were unable to calculate variances for these variables. In these situations, we weighted by cohort size. In some instances, studies reported follow-up to 12 or 24 mo but did not report on intermediate retention rates. In plotting attrition for such studies over time we used extrapolated values, taking the midpoint between the known adjacent values. For example, if a study reported to 12 mo but did not report the 6 mo value, we defined the 6 mo value as the midpoint between 0 and 12 mo, with 100% at baseline representing all of those who initially started therapy. We calculated weighted average attrition rates at each interval (6, 12, and 24 mo) for the reported numbers of participants remaining when using reported values and for the estimated numbers of participants remaining when using extrapolated values. Selected demographic variables relating cohort or program characteristics to attrition rates were analyzed using linear regression. Because only a few studies reported beyond 24 mo, we were unable to calculate any meaningful summary statistics beyond the 24 mo mark. To estimate aggregate average attrition rates at 6, 12, and 24 mo we used several approaches. Attrition for each program was plotted separately and attrition rates calculated as the percentage of patients lost per month. We also plotted Kaplan-Meier survival curves using the 6, 12, and 24 mo intervals as the step-down points. Fewer studies presented 12 mo data than 6 mo data, however, and fewer still contained 24 mo data. Many of the studies with the highest attrition contributed data only for the shorter time intervals. Given the concern that shorter durations of reporting could be associated with lower rates of patient retention, we also conducted sensitivity analyses to model possible future retention. For the best-case scenario, we optimistically assumed that no further attrition would occur beyond the last reported observation and extrapolated the last reported retention value forward to 24 mo. In the worst-case scenario, we extrapolated the slope of attrition forward in time, assuming that each cohort's attrition would continue along the same slope from the last reported observation to month 24. We assigned a lower limit of 0% in those situations where the estimated future retention rate fell below 0%. Our midpoint scenario was the mean of the best- and worst-case scenarios. Analyses were conducted using Excel, SAS version 8.2, and SPSS version 11.0. Results We included 32 publications reporting on 33 patient cohorts totaling 74,289 patients in 13 countries in our analysis. These studies were selected from a total of 871 potentially relevant, unique citations identified in our search (Figure 1). Figure 1 Study Flow Chart Table 1 summarizes key features of the studies, including the sites at which they were conducted. Not all of the publications reported all the details we sought about program and patient characteristics and retention, but all provided at least one indicator of patient retention after a median follow-up period of at least 6 mo. The studies report on patients who initiated ART as early as 1996, though most enrolled their cohorts between 2001 and 2004. The studies were published or presented between 2002 and 2007, with the majority appearing as peer reviewed articles in 2006 or 2007. Most of the programs were implemented by the public sector (17 of 33, 52%). Of 33 cohorts, 15 (45%) fully subsidized the cost of ART; six (18%) were partially subsidized; and six (18%) required patients to pay fully for their care; the rest did not report their payment structure. Roughly half were single-site programs (15 of 33, 45%); multi-site programs contributed data from between two and 69 sites. Table 1 Characteristics of Antiretroviral Treatment Programs and Patient Cohorts Included in This Analysis (extended on next page) Table 1 Extended. Table 1 also provides the population characteristics of the cohorts studied. The weighted mean age of the cohort participants was 35.5 y, and 53.7% of all patients were female (range 6%–70%). All but one cohort had median starting CD4+ T cell counts at or well below 200 × 103 cells/mm3, with a weighted mean starting CD4+ T cell count of 132 × 103 cells/mm3 (range 43–204). Table 2 presents the proportion of patients from each cohort who remained alive and under treatment with antiretroviral medications, transferred to another treatment facility, died, were lost to follow-up, or discontinued treatment with ARVs but remained in care at the end of the median follow-up period. Bearing in mind that we excluded studies with less than 6 mo median follow-up, the weighted average follow-up was 9.9 mo, after which time overall retention of patients alive, in care, and on ART was 77.5%. Table 2 Median Follow-Up and Rates of Patient Attrition, as Reported, from Antiretroviral Treatment Programs Across all the cohorts, the largest contributor to attrition was loss to follow-up (56% of attrition), followed by death (40% of attrition). The widely varying definitions of loss to follow-up used by the studies are indicated in Table 2. A small fraction (4% of attrition) discontinued ART but remained under care at the same site. Table 3 reports overall retention at 6, 12, and 24 mo. SA 1 had the highest retention at 12 mo. While this program did not report for 6 mo, at 12 mo its retention of 90% was still higher than the highest reported value among the programs that reported their 6 mo outcomes. The programs with the lowest retention at each time point were Malawi 4 (55%) at 6 mo; Uganda 2 (49%) at 12 mo; and Uganda 1 (46%) at 24 mo. Malawi 4 did not report beyond 6 mo and Uganda 2 did not report beyond 12 mo, but were both on a trajectory toward even lower retention rates at the later time points. Table 3 Retention of Patients at 6, 12, and 24 Months after Initiation of ART Using linear regression, we found no association between 6 mo attrition rates and cohort size (p = 0.32), attrition and baseline CD4+ cell counts (p = 0.72), proportion of women (p = 0.23), or year of program initiation (p = 0.40). Programs that required no payment had higher retention rates at 6 mo compared to those requiring partial or full payment (86.5% versus 76.7%, p = 0.01). Figures 2A–2C plot attrition rates for each cohort separately. The studies are clustered on the basis of duration of reporting. By 6 mo, 9 of 33 cohorts (27%) had 20% or greater attrition rates; by 12 mo this proportion had risen to 16 of 25 reporting cohorts (64%). Figure 2 Attrition Rates by Reporting Duration (A) Studies reporting to 6 mo median follow-up. (B) Studies reporting to 12 mo median follow-up. (C) Studies reporting to 24 mo median follow-up. (D) Weighted mean attrition rates by duration cohort. SA, South Africa. The weighted mean retention rates as reported in the studies were 79.8% at 6 mo, 75.1% at 12 mo, and 61.6% at 24 mo. As an alternative approach, we also plotted Kaplan-Meier survival curves at months 6, 12, and 24 for all the studies combined. The largest fall-off occurred between 6 and 12 mo; overall retention was approximately 89% by 6 mo, 70% by 1 year, and just under 60% by 2 years. Four of the eight studies in Figure 2A with attrition of at least 20% at 6 mo included data only to 6 mo. Similarly, of the cohorts with data at 12 mo and attrition of 25% or more, six of 11 did not extend beyond 12 mo. We therefore calculated the slopes for attrition rates for each group of cohorts in Figure 2A–2C separately, to determine if the average monthly attrition rates differed as the duration of reporting increased. As shown in Figure 2D, the weighted mean attrition rates were 3.3%/month, 1.9%/month, and 1.6%/month for studies reporting to 6 mo, 12 mo, and 24 mo, respectively, raising the possibility that shorter durations of reporting were associated with lower retention rates. Given this apparent reporting bias, we were concerned that reporting average retention rates using the simple aggregate weighted averages reported above would overestimate actual retention. We therefore conducted sensitivity analyses to model attrition rates under three different scenarios. As shown in Figure 3, all three scenarios are the same at 6 mo, with approximately 80% retention. Under the best-case scenario, further attrition would be negligible, with more than 76% still retained by the end of 2 y. Under the worst-case scenario, 76% of patients would be lost by 2 y. The midpoint scenario predicted patient retention of 50% by 2 y. Figure 3 Sensitivity Analysis for Attrition Discussion The analysis presented here suggests that ART programs in Africa are retaining, on average, roughly 80% of their patients after 6 mo on ART and between one-fourth and three-fourths of their patients by the end of 2 y, depending on the estimating method used. Prior to the availability of ART in Africa, the median interval from HIV infection to AIDS-related death was under 10 y; once a patient was diagnosed with AIDS, median survival was less than 1 y [7]. Since most patients in Africa initiate ART only after an AIDS diagnosis, most ART patients would have died within a year had antiretroviral therapy not been available. Each patient who is retained in care and on ART can thus be regarded as a life saved and a source of tremendous benefit to patients' families and communities. For those who have struggled to launch and expand treatment programs in resource-constrained settings, reaching a 60% patient retention—and thus survival—rate after two years of treatment, as estimated by the Kaplan-Meier survival analysis, in just a few years' time is an extraordinary accomplishment. It is also noteworthy in the global context: in developed countries, adherence to medication for chronic diseases in general averages only 50% [8]. Similarly, treatment completion rates for tuberculosis, which requires a temporary rather than permanent commitment to adherence and a less demanding dosing schedule, average 74% in the African region, with a range among countries from 22% to 94% [9]. Taken in the context of medication adherence in general, the record of African ART programs lies within the bounds of previous experience. At the same time, however, losing up to half of those who initiate ART within two years is cause for concern. From the data as reported, attrition averaged roughly 22% at 10 mo of follow-up. This average comprised mainly deaths (40% of attrition) and losses to follow-up (56%). In comparison, the ART-LINC Collaboration, which analyzed data from 18 cohorts across the developing world, reported loss to follow-up rates among the 13 sub-Saharan African cohorts averaging 15% (range 0%–44%) in the first year after initiation; mortality averaged 4.2% across all 18 cohorts (African regional rate not provided) [5]. On the basis of our survival and sensitivity analyses, we believe that actual attrition is higher than the 22% average we report, mainly because the programs with the highest attrition were least likely to provide data beyond the first 6 mo of ART. There are several plausible explanations for the higher attrition seen among programs with shorter durations of reporting. One possibility is that limited availability of resources to a given program could affect both its ability to retain patients and to conduct long-term surveillance of its outcomes. Another, less pessimistic explanation is that shorter durations of reporting reflect newer programs that are still in the process of developing optimal strategies for patient retention: had they reported at a later point in their implementation, retention rates might have been higher. The magnitude of the under-reporting bias is also uncertain, although our sensitivity analysis gives a plausible range between two implausible extremes (the best case being implausible because it assumes zero further attrition beyond the point of last reporting, and the worst case because it assumes that there will be constant attrition over time, rather than reaching a plateau or at least slowing substantially). The midpoint scenario suggests that approximately half of all patients started on ART were no longer on treatment at the end of two years. One of the principal challenges to this analysis is interpreting the large proportion of attrition from “loss to follow-up.” Some of these patients undoubtedly represent unrecorded deaths, but others may be patients who identified alternative sources for ART or had taken an extended “break” from therapy, to which they will return when their condition worsens again or they obtain the financial resources needed for transport or clinic fees. One study in Malawi discovered, for example, that 24% of patients originally recorded as lost to follow-up re-enrolled at the same site two years later when ART became free of charge [10]. For some of the studies included in this analysis, on the other hand, the unrecorded death explanation is more persuasive. For example, the Zambia 1 cohort of more than 16,000 patients reported 21% loss to follow-up after approximately 6 mo [11]. The scope and scale of this program means that it is the primary source of ART in Lusaka, making it unlikely that most of the estimated 3,300 lost patients could have found alternative sources of care. A recent attempt to trace lost-to-follow-up patients in Malawi determined that 50% had died, 27% could not be found, and most of the rest had stopped ART [12]. Because those reporting on these cohorts do not know what ultimately happened to patients categorized as lost to follow-up, high loss to follow-up rates can have varied interpretations. A good deal of research on barriers to adherence and reasons for treatment discontinuation has been published [13]. Important barriers to adherence include cost of drugs and/or transport, fear of disclosure or stigma, and side effects [14,15]. Some of these barriers can be addressed relatively easily, for example by providing transport vouchers to ensure that patients can attend the clinic; others, such as stigma, require more profound changes. In any case, high reported rates of loss to follow-up are a strong call to improve patient tracing procedures, to minimize the number of patients who fall into the difficult-to-address category of “lost, reason unknown.” Given that the long-term prognosis of ART patients is inversely related to starting CD4+ T cell counts [16,17], an additional issue to consider is the low median starting CD4+ cell counts reported by every one of the studies in this analysis. This problem has been identified previously, particularly in South Africa [18–20]. The analysis here makes clear that the problem is nearly universal in Africa and cuts across all types of treatment programs. It is evident in the high death rates reported by some studies after only a few months of follow-up, such as Malawi 3. There is a high degree of heterogeneity in retention rates between the different cohorts in our analysis and among categories of attrition. Some programs appear to have been highly successful in retaining patients, while others clearly struggled to do so. Some programs have suffered high mortality rates but low loss to follow-up, others the opposite. Early mortality, which may be largely due to the late stage at which many patients present for treatment, requires interventions different from those needed to address later loss to follow-up, about which very little is known. Interventions to address the various types of attrition must thus be tailored to local circumstances. The success of some programs with very high retention may provide examples that others can follow. The findings here can thus be seen as a part of an ongoing process to identify and solve problems within existing treatment programs, even as we expand their scope and launch new ones. Our analysis has a number of limitations, chiefly that incomplete reporting forced us to extrapolate some values. Extrapolating backward assumes that attrition rates are distributed linearly over time, which is unlikely to be the case. Evidence from this and other studies suggest that the highest attrition occurs during the first 6 mo. However, this limitation only pertains to the shape of the attrition curves, not to their final end points. Extrapolating forward, which we used only in the sensitivity analysis to establish the hypothetical “worst case” scenario, also suffers from this limitation, compounded by the fact that our confidence in the forward boundary is limited. In addition, our analysis is necessarily limited to publicly available reports and thus potentially subject to publication bias. Researchers may be less inclined to publish long-term outcomes from cohorts that have experienced very high early attrition. It is also likely that programs with better access to resources, both financial and human, are also better able to monitor, analyze, and publish their results. Our aggregate findings may thus represent the better-resourced programs in Africa. In conclusion, African ART programs are retaining about 60% of their patients in the first two years. This average masks a great deal of heterogeneity, however. At one end of the spectrum represented by the reviewed studies, two-year retention neared 90%; at the other end, attrition reached 50%. Better information on those who are lost to follow-up is urgently needed. Since losses to follow-up account for the majority of all attrition in more than half of the studies reviewed, the problem of attrition cannot be addressed effectively without better means to track patients. Only then can we address the pressing question of why patients drop out and what conditions, assistance, or incentives will be needed to retain them. Supporting Information Protocol S1 Search Protocol (85 KB DOC) Click here for additional data file.
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            Mortality of Patients Lost to Follow-Up in Antiretroviral Treatment Programmes in Resource-Limited Settings: Systematic Review and Meta-Analysis

            Background The retention of patients in antiretroviral therapy (ART) programmes is an important issue in resource-limited settings. Loss to follow up can be substantial, but it is unclear what the outcomes are in patients who are lost to programmes. Methods and Findings We searched the PubMed, EMBASE, Latin American and Caribbean Health Sciences Literature (LILACS), Indian Medlars Centre (IndMed) and African Index Medicus (AIM) databases and the abstracts of three conferences for studies that traced patients lost to follow up to ascertain their vital status. Main outcomes were the proportion of patients traced, the proportion found to be alive and the proportion that had died. Where available, we also examined the reasons why some patients could not be traced, why patients found to be alive did not return to the clinic, and the causes of death. We combined mortality data from several studies using random-effects meta-analysis. Seventeen studies were eligible. All were from sub-Saharan Africa, except one study from India, and none were conducted in children. A total of 6420 patients (range 44 to 1343 patients) were included. Patients were traced using telephone calls, home visits and through social networks. Overall the vital status of 4021 patients could be ascertained (63%, range across studies: 45% to 86%); 1602 patients had died. The combined mortality was 40% (95% confidence interval 33%–48%), with substantial heterogeneity between studies (P<0.0001). Mortality in African programmes ranged from 12% to 87% of patients lost to follow-up. Mortality was inversely associated with the rate of loss to follow up in the programme: it declined from around 60% to 20% as the percentage of patients lost to the programme increased from 5% to 50%. Among patients not found, telephone numbers and addresses were frequently incorrect or missing. Common reasons for not returning to the clinic were transfer to another programme, financial problems and improving or deteriorating health. Causes of death were available for 47 deaths: 29 (62%) died of an AIDS defining illness. Conclusions In ART programmes in resource-limited settings a substantial minority of adults lost to follow up cannot be traced, and among those traced 20% to 60% had died. Our findings have implications both for patient care and the monitoring and evaluation of programmes.
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              Explaining Adherence Success in Sub-Saharan Africa: An Ethnographic Study

              Introduction People living with HIV/AIDS in sub-Saharan Africa generally take more than 90% of prescribed doses of antiretroviral therapy (ART) [1–12]. This number exceeds the levels of adherence observed in North America [13] and dispels early scale-up concerns that adherence would be inadequate in settings of extreme poverty [14–16]. These near-perfect levels of adherence are being achieved despite formidable obstacles in the poorest regions of the world. Prohibitive costs of self-pay medications and drug stock-outs create insurmountable access barriers and lead to missed doses [3,7,10,12,17–20]. Expanding access to free ART and better distribution systems are addressing these obstacles. However, out-of-pocket expenses, including user fees, laboratory tests, and transportation over often long distances to and from treatment sites remain important barriers to sustained adherence and medical care [5,21–24]. Time spent traveling to and attending clinical appointments places additional economic strain on patients and their families by competing with income generating activities. Failure to negotiate economic obstacles can lead to ART interruptions, viral rebound, and resistance to limited available regimens [2,25]. Social and cultural obstacles also threaten adherence success. Stigma and the fear of disclosure cause patients to skip doses if privacy is unavailable at a scheduled dosing time [5,21]. Conflicting messages from health care practitioners and religious authorities may also interfere with adherence [26,27]. Behavioral obstacles similar to those observed elsewhere, including forgetting doses, fear of side effects, traveling without medications, and stopping drugs when symptoms disappear have also been reported for sub-Saharan Africa [3,4,10,18,25,26]. Adherence facilitators in resource-scarce settings have received less attention than adherence barriers. Currently, home-based adherence “help” is emerging as an important resource to support adherence. One form of home-based help centers on community health workers. Community health workers are laypersons trained and paid through treatment programs to provide adherence support and other services at home. They deliver medications, observe dosing, refer individuals for HIV-testing, offer encouragement, provide nutritional and housing support, help with transportation, and in general represent important links between clinics and communities [22,28–32]. A second form of home-based help is treatment supporters [33]. Treatment supporters (also termed treatment “partners” and treatment “assistants”) are laypersons nominated by patients to help with treatment adherence. They remind patients of dosing times, and often (though not always) witness dosing. They are not health care workers, but individuals with close personal ties to patients. As family members or friends, treatment supporters often live in the same or a nearby household. Treatment supporters are not specifically trained or paid, but nonetheless make a formal commitment to their role. Early studies suggest that both treatment support and community health worker approaches to home-based help may improve treatment outcomes [4,22,28,34]. More structured support in the form of clinic-based modified directly observed therapy (MDOT) has shown promising results in Kenya [35]. The factors accounting for the observed benefit of MDOT are currently unknown. Results of similar initiatives in the United States are more mixed [36,37]. To better understand exceptional adherence in sub-Saharan Africa, we analyzed qualitative data from an ethnographic study carried out in three countries: Nigeria, Tanzania, and Uganda. Methods Study Design This patient-centered ethnographic study took place in public HIV-treatment settings in Nigeria, Tanzania, and Uganda (see Table 1). The HIV/AIDS Clinic at Jos University Teaching Hospital (JUTH) is located in a medium-sized city in Nigeria's central plateau and currently follows more than 8,400 patients prescribed ART. The ART Clinic of Amana District Hospital is located in Dar es Salaam, Tanzania, and currently follows approximately 5,300 patients on ART. The Immune Suppression Syndrome (ISS) Clinic at Mbarara University of Science and Technology is located in rural southwest Uganda and currently follows approximately 7,000 patients prescribed ART. A wide range of geographic and social variation is represented across the three sites. Table 1 Study Site Characteristics Sampling We used a purposeful sampling design. The goal of purposeful sampling is to systematically represent a variety of perspectives on the topic under study [38]. Three different perspectives chosen for relevance to the topic of adherence were represented in this research: (1) patients; (2) treatment partners (termed “assistants” at the Tanzanian site); and (3) health care providers. In Nigeria and Tanzania, random samples of potential patient participants were drawn from the larger populations of adults meeting inclusion criteria. Inclusion criteria were: (1) age 18 y or older; (2) prescribed antiretroviral therapy for HIV/AIDS for no fewer than 6 and no more than 12 mo at the time of sampling; and (3) residence within 20 km of Jos University Teaching Hospital or Amana District Hospital. In Uganda, patient participants were drawn from the larger Uganda Antiretroviral Treatment Outcomes (UARTO) study, a prospective study of antiretroviral-naïve patients initiating ART led by one of the authors (DRB). Treatment partners who participated in the study were referred by patient participants. Patients were asked to name “someone who assisted them in their efforts to take antiretroviral medications.” Health care providers who participated were volunteers who responded to a letter of invitation introducing the study. Recruitment In Nigeria and Tanzania, patient participants were recruited at the clinic during routine follow-up visits. At a free moment (e.g., while waiting to be seen or at the conclusion of the visit), staff approached eligible individuals to describe the study and extend an invitation to participate. In Uganda, permission to contact prospective patient participants for recruitment was first obtained by UARTO research staff. Once permission was obtained, a research assistant for this ethnographic study approached the participant for consent. Treatment partners were visited or telephoned by staff after giving permission for contact. Health care providers who indicated interest in response to the letter of invitation were invited to participate. The research was approved by the institutional review boards at Harvard Medical School (Boston, Massachusetts, United States); Jos University Teaching Hospital (Jos, Nigeria); Muhimbili University of Health and Allied Sciences (Dar es Salaam, Tanzania); Mbarara University of Science and Technology (Mbarara, Uganda); and the Uganda National Council for Science and Technology (Kampala, Uganda). Written informed consent was obtained from all participants. Data Collection Data were collected through in-person qualitative interviews and observations of clinic activities. Information on adherence was collected through the 3-d self-report instrument from the AIDS Clinical Trials Group edited and adapted for cultural context [39]. All data were collected by African researchers. The researchers were Nigerians, Tanzanians, and Ugandans who had been trained in ethnographic data collection techniques by two of the authors (NCW and MAW). In-Person Interviews Multiple interviews were conducted with patient and treatment partner participants to allow for elaboration of areas whose significance emerged as analysis proceeded. The interviews were semistructured, meaning that predesignated core topics, but not specific questions, were covered in each session. This approach ensured that specific areas were covered in each interview, but also allowed unanticipated themes to emerge. Core topics for patient interviews included: (1) specific experiences of taking ART (e.g., “stories” of the most recent dose taken, most recent dose missed); (2) clinic visits; (3) help received from treatment partners. Core topics for treatment partner interviews included: (1) types of help provided; (2) feelings about being a treatment partner; (3) perceptions of the impact of help. Core topics for health care provider interviews included: (1) description of typical clinic visit; (2) the ways adherence comes up in clinical visits; (3) perceptions of barriers to adherence for patients. The goal of the interviews was to understand ART adherence from the interviewees' points of view. Patient participant and treatment partner interviews were conducted in homes or at other locations of the interviewee's choosing outside the clinic. Health provider interviews were conducted at the clinic. Privacy was protected by conducting the interviews in locations where the conversation could not be overheard. Interviewees had the option of conducting the interview in the local language (Hausa, Kiswhahili, Runyankore) or in English. Interviews were audio-recorded with permission and averaged about an hour in length. Patients received compensation in the form of reimbursement for transportation (where applicable) or a small stipend. Field Observations Observations are a hallmark of ethnographic data collection. They involve the presence of a researcher in a naturalistic setting and the witnessing of events and activities of interest to a given research inquiry [40]. Observations have the advantage of providing a direct view of phenomena under study to complement one that is mediated through verbal interview reports. The following activities were observed by research staff at each of the clinical sites: (1) routine follow-up visits of patients taking ART; (2) counseling sessions; (3) health education sessions; and (4) the dispensing of antiretroviral medications. Observation sessions lasted 30 min to 1 h. Data Preparation Shortly after the completion of each interview, the interviewer produced a detailed write-up in English on the interview content, using the audio-recording and notes taken during the interview to ensure accuracy and completeness. The interview write-ups took the form of “stream-lined” transcripts. A “stream-lined” transcript is produced in English (without first transcribing in the local language) and consists only of interview questions asked and their responses. This approach to data preparation has several advantages. First and foremost, it captures the desired level of detail often lost in a summary and preserves the exact words of the interviewee. It can be completed in a reasonable amount of time by the interviewer, eliminating the expense of separate transcription. Accuracy is also improved using this approach. The write-ups contain a section in which the interviewer adds relevant contextual details and impressions not captured in the transcript. Descriptions of activities observed were written up following each session as field notes. Data Analysis Analysis aimed at explaining adherence to ART using an inductive approach to category construction and interpretation of data [41,42]. Descriptive categories were constructed to characterize approaches to overcoming economic obstacles to care. To construct the categories, content related to patients' adherence experiences was retrieved from coded data. Relevant sections of text were identified, copied, and grouped according to the type of adherence obstacle represented. These sections of text were then reread to characterize the ways in which patients negotiated these obstacles to avoid missing doses and clinic visits. The data were re-organized in terms of these characterizations to produce an initial category “set.” Each category forming the set was named, defined, and illustrated through interview excerpts. The set was refined—revised, specified, and elaborated—through successive returns to the data in which additional sections of relevant text were extracted. Interpretive analysis used a theoretic social science construct to develop an argument based on the categories. The data suggested “social capital,” i.e., resources accruing from social networks, as the best explanatory construct to interpret adherence strategies and explain their success. Results Study Participants 158 patients, 45 treatment partners, and 49 health care providers participated in this study. 414 interviews and 136 observation sessions were conducted across the three sites. Characteristics of Study Participants Patients. Approximately two-thirds (65%) of patients who participated in this study were women. The mean age of the patient group was 38 y. Less than half (44%) were married or living with a partner. Approximately three-quarters (71%) of the patients were Christian; the remainder were Muslim. Primary school was the highest level of education completed for slightly more than half (57%) of the patient sample. 65% of patients met criteria for Stage III or Stage IV disease according to World Health Organization (WHO) criteria at initiation of HIV care. Treatment partners. More than half (56%) of treatment partners were female. The mean age of the group was 39 y. Three-quarters (73%) were married or living with a partner. 60% were Christian; the remainder were Muslim. Primary school was the highest level of education completed for about a third (35%) of the group. Health care providers. Approximately two-thirds (64%) of health care provider participants were women, and the mean age of the group was 38 y. About a quarter (27%) of the sample were physicians; a third (35%) were nurses. Nineteen percent were counselors and 16% were pharmacists or medication dispensers. Two full-time “tracking” officers, responsible for locating patients lost to follow-up, were included in the sample (2%), as was another expert patient fulfilling an administrative function (1%). Ethnographic Data On the basis of category construction and interpretation of the data, we organized the findings from ethnographic data to demonstrate: (1) prioritization of adherence to overcome economic obstacles, and (2) responsibility in social relationships as an explanation of prioritization. Prioritizing adherence to overcome economic obstacles. Participants reported that most adherence obstacles were related to resource scarcity. Resource scarcity means that basic commodities required for daily living are not easily available. For example, obtaining money for transportation to clinic appointments (where prescriptions are refilled) is rarely a simple matter of dipping into a ready supply of cash. Concerted effort and specific strategies were required to raise needed funds to secure medications. Patient participants spoke of raising transport funds through loans and handouts, what they termed borrowing and “begging.” Loans—from treatment partners and other family and friends—were a reliable source of cash but were expected to be repaid, often with interest. Some interviewees reported selling possessions or earning income through work to repay loans. Others borrowed repeatedly but saw no way to resolve the debts they had incurred. Chronic indebtedness was a source of considerable emotional distress for borrowers, as these interview excerpts indicate: “Most times I borrow money [to get to clinic] and worry about re-paying the debt.” (Interviewer: “How do you re-pay the debts?”) “I work and look for money digging and weeding in people's plantations.” And: “When you do not have money you think of how you will come to clinic for medicine. [Last time] I borrowed from a friend but now I have paid it back.” (Interviewer: “How did you feel about borrowing?”) “I felt raw and depressed because I got worried. Actually I lost kilograms. When I came to the clinic and got weighed I had lost 2 kgs.” Treatment partners reported borrowing to help patients. In the following excerpt, a treatment partner describes how “having friends who have shops” provides access to credit that enables her to accommodate the food preferences of the patient she helps, who is not doing well: “The patient is seriously sick now. She is not ok. And when patients are seriously sick they lose their appetite. If you give her beans she will not eat. So we are borrowing rice from people with shops. They trust us and they lend, paying is a problem. I live with good neighbors who have shops. They help me, and at the end of the month I pay them. She likes rice very much. If you cook rice with anything, she eats.” Requesting handouts of cash—termed “begging” by interviewees—was also reported. Handouts were not expected to be repaid. Interviewees “begged” handouts for transport funds from family, friends, and health care providers: “If I see the date [of clinic visit] is approaching, I will start begging for help. I tell people the date of my clinic is coming and that I don't have money, so they should assist me.” And: “Sometimes I beg or ask for money to attend the clinic. Sometimes I have money for going there and beg at the clinic [for money to return]. Last time my uncle gave me money to go there. To get back I had to beg for money from the doctor.” Cash in hand, whether borrowed, “begged,” or earned, is immediately subject to competing claims. As a result, patient participants were continually confronted with “impossible choices”: HIV care or treatment for a sick child? HIV care or school fees? HIV care or food for the family? Resource scarcity sometimes required denying the needs of loved ones in order to secure money for transportation to clinic: “Seven days before going to get the medicine, I try to look around for money. If it means not eating or buying food for the children I do that, because they told us that we are not supposed to miss …” Food, essential to survival and functional recovery while on ART, was often treated as expendable. Patient participants understood that taking medications with food and adhering to a healthy diet that includes a variety of food groups is important for their treatment and recovery on ART. Though reluctant to ignore doctors' orders, patient participants sacrificed their own need for food to meet the needs of others close to them: “If I don't have porridge [when I take the pills] I feel nauseated. [But at times it's hard to get porridge] because I buy it with money and when it's the school fee season there is no money.” Strategies for obtaining help from others notwithstanding, there are times when patients simply “do without.” They do without food, but take their medications anyway, despite hunger-induced exacerbation of ART side effects. They do without transport, and walk to clinic, which can often take several hours: “It's hard to take meds without food. When I take meds without food I get a stomachache. But you can't miss meds because of food. I take meds with an expectation that I may get food later.” And: “[When there's no food] I just take [the drugs] on an empty stomach. And I will feel like vomiting – dizzy, weak and all. When I don't eat before taking drugs, honestly, I don't find it easy at all.” And: “Five months ago the car got spoilt and now I am walking to the clinic. At first I had money for a [motorcycle taxi] but now I do not even have that. I will continue walking whatever happens.” Borrowing and “begging” transport funds, making impossible choices, and “doing without” are ways of overcoming the economic obstacles that continue to block access to treatment for HIV/AIDS despite the availability of free ART. These sacrifices reflect the extraordinary efforts and commitment of individuals who are assigning “first priority” to HIV care: “Taking meds is my life. I have to give meds first priority because they are helping me.” Explaining prioritization: adherence to improve health and fulfill responsibility in social relationships. As in resource-rich settings, the immediate reason patients assign “first priority” to adherence is to improve health. Patient participants described profound improvements after starting ART, as grave illness gave way to weight gain, renewed energy and strength, and the ability to care for themselves. With treatment, most patients returned to normal activities, including income-generation. Clinical improvement also brought renewed hope for a long life. The restoration of health and hope, together with the memory of previous suffering and the threat of jeopardizing what has been gained should adherence lapse, provide powerful motivation to take ART correctly. However, the pursuit of health does not completely explain why patients assign first priority to adherence. For African patients, good health is important because it helps to preserve relationships with others. The contribution of social relationships to mental and physical health is well-documented for North America [43–47]. In settings of economic scarcity, relationships are not only important for health but also essential to survival. Our data suggest the prioritization of adherence reflects the importance of relationships as a resource for managing economic hardship. Chronic illness is always hard on close relationships. But when health care is a scarce resource, illness imposes an extra burden on social intimates who must then assume responsibility for care. Care provision means investing valuable time, energy, and financial resources to promote the patient's health. The investment is justified when there is an expectation of recovery, but becomes harder to defend if it appears the illness may be terminal. When an illness is considered terminal, caregivers may look for ways of severing their connection with the patient and ending the drain on scarce resources. One interviewee explained it this way: “When I fell sick, some of the people in my family thought I was going to die soon, so they advised my brother and sister (whom I was living with) to look for transport to send me back to the village. Some people, if they see you in terminal illness, they start to value their money. They think, ‘this illness is getting worse. It'll really cost me to transport a dead body, whereas to arrange to transport a living body is different….'” Patient participants in this study received adherence assistance from several sources. In addition to money for transport, treatment partners, other family and friends, and fellow patients provided regular reminders of dosing times. They offered encouragement by emphasizing the benefits of treatment and continually reinforcing the importance of taking medications as prescribed. Treatment supporters also worked to destigmatize HIV/AIDS. They socialized in public with infected persons; likened HIV/AIDS to common, but less stigmatized conditions (e.g., malaria); and challenged myths by deliberately sharing food and eating utensils. “…when they [a set of friends of the patient] started understanding the problem [HIV/AIDS], everybody started withdrawing from eating in the same container with him. …I saw everyone was running away from him so I called him and lied to him. I did not want to create division and break him the more. So I told him, ‘look, I met one of your doctors and she told me that you have to be very careful because of infection. You don't eat anything anybody else eats, you don't use the same cup anybody else uses, because you could get another infection and it could be even worse.' And then I ate with him, so the others would see.” Health care providers were also important sources of help. They supported adherence through education, reinforcement, even the organization of care. At one site, providers maintained a flexible schedule to accommodate patients, even though it made their days longer. They instituted a policy of accepting “latecomers”—individuals who arrived after the deadline for being seen on a given day had passed. Not infrequently, providers stepped outside their professional roles to make resources available to those in need. They provided money and food at their own expense, and organized larger efforts to generate support. In the following quote, a provider describes her practice of helping indigent women patients toward financial independence by securing small loans and then indicating how they might use the funds to start small businesses: “I say, ‘go around in your area, your community. Look at what people like that is not available there. Go and get some of these things and begin to sell them.' That is how I do it.” Providers expected adherence and did not hesitate to make their expectations known. In clinic, staff communicated expectations of adherence by stating repeatedly that antiretroviral therapy must be taken as prescribed. In extreme cases, they even threatened those who repeatedly missed clinic appointments with withdrawal of access, as we see from the following report: “I told [the patient] this morning, ‘You had better decide if you are going to take these drugs. Because the way you are doing, you are creating resistance. I am giving you my last warning. If you come next time with the same story, even if you beg from heaven, we will discontinue you.' That is what I told her. (Interviewer: And would you really?) If she comes back with the same story, I am serious. We will discontinue her. We will.” Treatment partners also expected adherence. As one person put it: “We insist she take her meds. We help her because we want her to take her meds….If you don't take your meds, you will die.” Friends and family members taking responsibility for someone's well-being were sensitive to the fact that adherence meant “doing well,” and “doing well” made their job easier. They insisted on adherence as a gesture aimed at reducing what one treatment partner termed the “work” of care. He explained this way: “If he [patient] continues well, the work of caring for him will be over. If he continues well, I can visit him at the time I want. But if he is sick, I have to help him so he will be okay and everyone else can continue with their business. That's why I insist, ‘my relative, don't ignore what they instruct you to do. If they tell you to take [ART] in the morning and evening—do it! Don't feel it is difficult work and don't feel tired.'” Making a similar observation, someone else said: “[Before the patient improved] it was difficult. I had to be there all the time. I kept the time for meds in my mind instead of him. I was unable to go anywhere or do anything else before he takes his meds. Now I'm free to do anything at any time without having many thoughts.” Social expectations of adherence create obligations on the part of patients, who must meet these expectations to preserve relationships with helpers. By taking ART as prescribed and “doing well,” patients reduce the burden of help and acknowledge the work of care. This in turn fosters continued good will on the part of helpers and reinforces the likelihood that assistance will be available when future needs arise. In settings of poverty, where “community safety nets” [48] replace public entitlements as resources for weathering economic crises, the consistent good will of potential helpers is required for survival. Discussion Our data point to economic obstacles and the strength of social relationships as principal mediators of sustained adherence in sub-Saharan Africa. These obstacles are being routinely overcome through strategies aimed at prioritizing adherence. Prioritization is accomplished with help from others. The relationships that provide this assistance are a critical resource not only for supporting adherence, but for managing economic hardship more generally. In social science, the use of relationships to obtain benefits and achieve desired ends has been termed “social capital.” In North America, adherence to ART for HIV/AIDS has been interpreted as the product of information, motivation, and behavioral skills operating at the individual level [49]. Such an interpretation depicts the individual as the primary agent of behavior, and de-emphasizes social context. As an analytic construct, social capital has been characterized as a property of individuals and of organizations. It has been used in the U.S. and Europe to examine the dynamics of civic engagement [50], the accomplishment of social action [51], and the production and reproduction of inequalities [52]. The ingredients of social capital (trust, cooperation, reciprocity, sociability) have been well-studied, and care has been taken to distinguish social capital from other forms of capital (e.g., economic, human, symbolic) [53]. Analysts agree on the characterization of social capital as a resource grounded in networks of social relationships. We define it as “resources accruing from a network of relationships that help individuals to solve problems and get things done.” The concept of social capital adds considerable explanatory power to the study of HIV/AIDS in sub-Saharan Africa. It explains not only adherence success, but also the threat of stigma. Stigma is feared because it leads to social isolation, undermining relationships that are essential to survival. Avoiding HIV-related stigma can be understood as an effort to conserve social capital, a necessary resource in settings of poverty. Relationships confer responsibility in addition to providing resources. Recipients of help must recognize what they receive and reciprocate. To ignore these responsibilities is to risk resentment on the part of helpers. Adherence allows patients to meet social responsibilities by preventing health decline and reducing the need for support. This creates a positive feedback loop in which social relationships help patients overcome economic barriers to sustained adherence. Adherence in turn fulfills responsibilities to others. Recognizing and fulfilling responsibilities to helpers through adherence strengthens social relationships and ensures more help will be available in the future. Preservation of social capital lies at the heart of our explanation, but we recognize influences in other domains. These include: (1) social structure, e.g., patterns of inequality; (2) infrastructure, e.g. weaknesses in health systems; (3) culture, e.g., values, religious beliefs; and (4) individual experience and behavior, e.g., side effects, lack of information, psychological distress. We offer here a social relational theory to explain adherence differences between resource-rich and resource-poor settings, while acknowledging other kinds of determinants that merit further study. Qualitative analyses contribute to quantitative research in medicine and public health by delineating useful constructs and testable hypotheses. In detailing the explanatory power of social capital, we point to its likely predictive value in examining hypotheses such as: Greater social capital will be associated with better ART access and adherence. Verification of such hypotheses will guide interventions to sustain adherence and improve treatment effectiveness. A question that immediately arises is whether the benefits of social capital are sustainable? How long can patients realistically expect to receive resources from others who are struggling with resource scarcity themselves? Social capital, unlike many other forms of capital, increases with use [54]. However, while it may explain how economic obstacles to adherence have been overcome to date, it leaves the fundamental problem of poverty unaddressed. Caregiver efforts to compensate for the effects of poverty are not a substitute for affordable transportation, plentiful nutritious food, clean water, adequate living situations, and accessible and effective medical care. Eliminating underlying economic obstacles will reduce the strain on relationships and thus help to sustain both social capital and adherence. We are not the first to address the social dimensions of adherence to ART in the context of international scale-up. A call for a biosocial framing laid out general principles of a socially grounded analysis and proposed relevant analytic concepts—social capital among them [55]. The importance of explaining adherence success in sub-Saharan Africa was stated specifically in a more recent account, which offered an anthropological history of treatment access and introduced “therapeutic citizenship” as an explanatory construct [56]. We propose an alternative construct emphasizing interpersonal relations, and add supporting data. There are several limitations to our findings. First, African societies are highly heterogeneous. We collected data in urban and rural settings in East and West Africa. However, the extent to which these concepts explain adherence behavior in other African contexts will be an important area of future study. Second, we have developed a social explanation but left other domains of influence unexplored. As we develop theoretical models of adherence for resource-scarce locations, these types of influences should be more comprehensively represented. Third, while ART scale-up has been highly successful, the dynamics of adherence will likely evolve as patients confront long-term treatment. Finally, we draw upon social capital as an explanatory construct, but stop short of elaborating underlying cross-cultural differences in definitions of personhood [57]. Conclusion Like persons living with HIV/AIDS all over the world, sub-Saharan Africans adhere to ART because they want to be healthy. But the desire for health alone does not adequately explain adherence success. A more complete explanation highlights the role of social capital in relationships as a resource for prioritizing adherence and overcoming economic obstacles to care. Adherence preserves social capital by protecting relationships required for survival in settings of poverty. This may be what patients are referring to when they tell us they have “no choice” but to adhere.
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                Author and article information

                Contributors
                Role: Academic Editor
                Journal
                PLoS Med
                PLoS Med
                PLoS
                plosmed
                PLoS Medicine
                Public Library of Science (San Francisco, USA )
                1549-1277
                1549-1676
                January 2013
                January 2013
                8 January 2013
                9 January 2013
                : 10
                : 1
                Affiliations
                [1 ]Harvard Medical School, Boston, Massachusetts, United States of America
                [2 ]University of California at San Francisco, San Francisco, California, United States of America
                [3 ]Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
                [4 ]Jos University Teaching Hospital, Jos University, Jos, Nigeria
                [5 ]Mbarara Regional Referral Hospital, Mbarara University of Science and Technology, Mbarara, Uganda
                [6 ]Management and Development for Health, Dar es Salaam, Tanzania
                St. Michael's Hospital, Canada
                Author notes

                The authors have declared that no competing interests exist.

                Conceived and designed the experiments: NCW. Performed the experiments: NCW MAW SFK OOA WRM GC PAA. Analyzed the data: NCW MAW EHG. Contributed reagents/materials/analysis tools: EHG. Enrolled patients: MAW SFK OOA WRM GC PAA. Wrote the first draft of the manuscript: NCW. Contributed to the writing of the manuscript: NCW MAW EHG. ICMJE criteria for authorship read and met: NCW MAW EHG SFK OOA WRM GC PAA. Agree with manuscript results and conclusions: NCW MAW EHG SFK OOA WRM GC PAA.

                Article
                PMEDICINE-D-12-01188
                10.1371/journal.pmed.1001369
                3541407
                23341753

                This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Page count
                Pages: 10
                Funding
                This study was supported by grants from the Center for AIDS Research (CFAR) at Harvard University, Boston, MA, USA (no number) and the US National Institute of Mental Health (R21MH085557). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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                Research Article
                Medicine
                Social and Behavioral Sciences

                Medicine

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