The prevalence of frailty syndrome in an older population from Spain. The Toledo study for healthy aging

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Abstract

To assess the prevalence of the frailty syndrome and its associated variables among the older adult population in the province of Toledo (Spain). Data were taken from the Toledo Study for Healthy Aging, a population-based study conducted on 2,488 individuals aged 65 years and older. Study participants were selected by a two-stage random sampling from the municipal census of Toledo, covering both institutionalized and community dwelling persons from rural and urban settings. Data were collected from 2006 to 2009, and included information on social support, activities of daily living, comorbidity, physical activity, quality of life, depressive symptoms, and cognitive function. In addition, a nurse collected anthropometric data, conducted tests of physical performance (walk speed, upper and lower extremities strength, and the stand-and-sit from a chair test) and obtained a blood sample. The diagnosis of the frailty syndrome was based on the Fried criteria (weakness, low speed, low physical activity, exhaustion, and weight loss). In total, 41.8% (95% confidence interval [CI] 39.4-44.2%) of the study participants were prefrail, and 8.4% (95% CI 7.1-9.8%) were frail. There were no differences in the prevalence of frailty by sex, level of education, occupation, marital status, or place of residence. The frequency of the frailty syndrome increased with age, and was higher in those with disability, depression, hip fracture and other comorbidity, such as cardiovascular disease and disorders of the central nervous system. The prevalence of the frailty syndrome in older Spanish adults is high and similar to that reported in other populations in the Mediterranean basin.

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Frailty: an emerging research and clinical paradigm--issues and controversies.

Howard Bergman, Luigi Ferrucci, Jack Guralnik … (2007)

Clinicians and researchers have shown increasing interest in frailty. Yet, there is still considerable uncertainty regarding the concept and its definition. In this article, we present perspectives on key issues and controversies discussed by scientists from 13 different countries, representing a diverse range of disciplines, at the 2006 Second International Working Meeting on Frailty and Aging. The following fundamental questions are discussed: What is the distinction, if any, between frailty and aging? What is its relationship with chronic disease? Is frailty a syndrome or a series of age-related impairments that predict adverse outcomes? What are the critical domains in its operational definition? Is frailty a useful concept? The implications of different models and approaches are examined. Although consensus has yet to be attained, work accomplished to date has opened exciting new horizons. The article concludes with suggested directions for future research.

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Frailty: emergence and consequences in women aged 65 and older in the Women's Health Initiative Observational Study.

Nancy Fugate Woods, Andrea LaCroix, Shelly Gray … (2005)

To define frailty using simple indicators; to identify risk factors for frailty as targets for prevention; and to investigate the predictive validity of this frailty classification for death, hospitalization, hip fracture, and activity of daily living (ADL) disability. Prospective study, the Women's Health Initiative Observational Study. Forty U.S. clinical centers. Forty thousand six hundred fifty-seven women aged 65 to 79 at baseline. Components of frailty included self-reported muscle weakness/impaired walking, exhaustion, low physical activity, and unintended weight loss between baseline and 3 years of follow-up. Death, hip fractures, ADL disability, and hospitalizations were ascertained during an average of 5.9 years of follow-up. Baseline frailty was classified in 16.3% of participants, and incident frailty at 3-years was 14.8%. Older age, chronic conditions, smoking, and depressive symptom score were positively associated with incident frailty, whereas income, moderate alcohol use, living alone, and self-reported health were inversely associated. Being underweight, overweight, or obese all carried significantly higher risk of frailty than normal weight. Baseline frailty independently predicted risk of death (hazard ratio (HR)=1.71, 95% confidence interval (CI)=1.48-1.97), hip fracture (HR=1.57, 95% CI=1.11-2.20), ADL disability (odds ratio (OR)=3.15, 95% CI=2.47-4.02), and hospitalizations (OR=1.95, 95% CI=1.72-2.22) after adjustment for demographic characteristics, health behaviors, disability, and comorbid conditions. These results support the robustness of the concept of frailty as a geriatric syndrome that predicts several poor outcomes in older women. Underweight, obesity, smoking, and depressive symptoms are strongly associated with the development of frailty and represent important targets for prevention.

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A comparison of frailty indexes for the prediction of falls, disability, fractures, and mortality in older men.

Thuy-Tien Dam, Eric S Orwoll, Steven R Cummings … (2009)

To compare the validity of a parsimonious frailty index (components: weight loss, inability to rise from a chair, and poor energy (Study of Osteoporotic Fractures (SOF) index)) with that of the more complex Cardiovascular Health Study (CHS) index (components: unintentional weight loss, low grip strength, poor energy, slowness, and low physical activity) for prediction of adverse outcomes in older men. Prospective cohort study. Six U.S. centers. Three thousand one hundred thirty-two men aged 67 and older. Frailty status categorized as robust, intermediate stage, or frail using the SOF index and criteria similar to those used in CHS index. Falls were reported three times for 1 year. Disability (>or=1 new impairments in performing instrumental activities of daily living) ascertained at 1 year. Fractures and deaths ascertained during 3 years of follow-up. Analysis of area under the receiver operating characteristic curve (AUC) statistics compared for models containing the SOF index versus those containing the CHS index. Greater evidence of frailty as defined by either index was associated with greater risk of adverse outcomes. Frail men had a higher age-adjusted risk of recurrent falls (odds ratio (OR)=3.0-3.6), disability (OR=5.3-7.5), nonspine fracture (hazard ratio (HR)=2.2-2.3), and death (HR=2.5-3.5) (P<.001 for all models). AUC comparisons revealed no differences between models with the SOF index and models with the CHS index in discriminating falls (AUC=0.63, P=.97), disability (AUC=0.68, P=.86), nonspine fracture (AUC=0.63, P=.90), or death (AUC=0.71 for model with SOF index and 0.72 for model with CHS index, P=.19). The simple SOF index predicts risk of falls, disability, fracture, and mortality in men as well as the more-complex CHS index.