Associations Between Food Insecurity and Common Mental Health Problems Among Reproductive-Aged Women in Kabul-Afghanistan

Calculation of exact sample size is an important part of research design. It is very important to understand that different study design need different method of sample size calculation and one formula cannot be used in all designs. In this short review we tried to educate researcher regarding various method of sample size calculation available for different study designs. In this review sample size calculation for most frequently used study designs are mentioned. For genetic and microbiological studies readers are requested to read other sources.

More than 2 decades of conflict have led to widespread human suffering and population displacement in Afghanistan. In 2002, the Centers for Disease Control and Prevention and other collaborating partners performed a national population-based mental health survey in Afghanistan. To provide national estimates of mental health status of the disabled (any restriction or lack of ability to perform an activity in the manner considered normal for a human being) and nondisabled Afghan population aged at least 15 years. A national multistage, cluster, population-based mental health survey of 799 adult household members (699 nondisabled and 100 disabled respondents) aged 15 years or older conducted from July to September 2002. Fifty district-level clusters were selected based on probability proportional to size sampling. One village was randomly selected in each cluster and 15 households were randomly selected in each village, yielding 750 households. Demographics, social functioning as measured by selected questions from the Medical Outcomes Study 36-Item Short-Form Health Survey, depressive symptoms measured by the Hopkins Symptoms Checklist-25, trauma events and symptoms of posttraumatic stress disorder (PTSD) measured by the Harvard Trauma Questionnaire, and culture-specific symptoms of mental illness and coping mechanisms. A total of 407 respondents (62.0%) reported experiencing at least 4 trauma events during the previous 10 years. The most common trauma events experienced by the respondents were lack of food and water (56.1%) for nondisabled persons and lack of shelter (69.7%) for disabled persons. The prevalence of respondents with symptoms of depression was 67.7% (95% confidence interval [CI], 54.6%-80.7%) and 71.7% (95% CI, 65.0%-78.4%), and symptoms of anxiety 72.2% (95% CI, 63.8%-80.7%) and 84.6% (95% CI, 74.1%-95.0%) for nondisabled and disabled respondents, respectively. The prevalence of symptoms of PTSD was similar for both groups (nondisabled, 42.1%; 95% CI, 34.2%-50.1%; and disabled, 42.2%; 95% CI, 29.2%-55.2%). Women had significantly poorer mental health status than men did. Respondents who were disabled had significantly lower social functioning and poorer mental health status than those who were nondisabled. Feelings of hatred were high (84% of nondisabled and 81% of disabled respondents). Coping mechanisms included religious and spiritual practices; focusing on basic needs, such as higher income, better housing, and more food; and seeking medical assistance. In this nationally representative survey of Afghans, prevalence rates of symptoms of depression, anxiety, and PTSD were high. These data underscore the need for donors and health care planners to address the current lack of mental health care resources, facilities, and trained mental health care professionals in Afghanistan.

Food insecurity is a persistent concern in high-income countries, and has been associated with poor mental health, particularly among females. We conducted a scoping review to characterize the state of the evidence on food insecurity and mental health among women in high-income countries. The research databases PubMed, EMBASE, and psycINFO were searched using keywords capturing food insecurity, mental health, and women. Thirty-nine articles (representing 31 unique studies/surveys) were identified. Three-quarters of the articles drew upon data from a version of the United States Department of Agriculture Household Food Security Survey Module. A range of mental health measures were used, most commonly to measure depression and depressive symptoms, but also anxiety and stress. Most research was cross-sectional and showed associations between depression and food insecurity; longitudinal analyses suggested bidirectional relationships (with food insecurity increasing the risk of depressive symptoms or diagnosis, or depression predicting food insecurity). Several articles focused on vulnerable subgroups, such as pregnant women and mothers, women at risk of homelessness, refugees, and those who had been exposed to violence or substance abuse. Overall, this review supports a link between food insecurity and mental health (and other factors, such as housing circumstances and exposure to violence) among women in high-income countries and underscores the need for comprehensive policies and programs that recognize complex links among public health challenges.