Prevalence and 10‐Year Outcomes of Frailty in Older Adults in Relation to Deficit Accumulation

Journal of the American Geriatrics Society - Tập 58 Số 4 - Trang 681-687 - 2010
Xiaowei Song1,2,3, Arnold Mitnitski1,2,3, Kenneth Rockwood1,2,3
1From the *Departments of Medicine and ‡Mathematics and Statistics, Dalhousie University, Halifax, Canada
2§Central for Health Care of the Elderly, QEII Health Sciences Centre, Capital District Health Authority, Halifax, Canada.
3National Research Council, Institute for Biodiagnostics-Atlantic, Halifax, Canada

Tóm tắt

OBJECTIVES: To evaluate the prevalence and 10‐year outcomes of frailty in older adults in relation to deficit accumulation.DESIGN: Prospective cohort study.SETTING: The National Population Health Survey of Canada, with frailty estimated at baseline (1994/95) and mortality follow‐up to 2004/05.PARTICIPANTS: Community‐dwelling older adults (N=2,740, 60.8% women) aged 65 to 102 from 10 Canadian provinces. During the 10‐year follow‐up, 1,208 died.MEASUREMENTS: Self‐reported health information was used to construct a frailty index (Frailty Index) as a proportion of deficits accumulated in individuals. The main outcome measure was mortality.RESULTS: The prevalence of frailty increased with age in men and women (correlation coefficient=0.955–0.994, P<.001). The Frailty Index estimated that 622 (22.7%, 95% confidence interval (CI)=21.0–24.4%) of the sample was frail. Frailty was more common in women (25.3%, 95% CI=23.2–27.5%) than in men (18.6%, 95% CI=15.9–21.3%). For those aged 85 and older, the Frailty Index identified 39.1% (95% CI=31.3–46.9%) of men as frail, compared with 45.1% (95% CI=39.7–50.5%) of women. Frailty significantly increased the risk of death, with an age‐ and sex‐adjusted hazard ratio for the Frailty Index of 1.57 (95% CI=1.41–1.74).CONCLUSION: The prevalence of frailty increases with age and at any age lessens survival. The Frailty Index approach readily identifies frail people at risk of death, presumably because of its use of multiple health deficits in multidimensional domains.

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Journal of the American Geriatrics Society

Tập 58 Số 4

681-687

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