Justin C Brown1, Michael O Harhay1, Meera N Harhay2. 1. Center for Clinical Epidemiology and Biostatistics, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania. 2. Division of Nephrology, Department of Medicine, College of Medicine, Drexel University, Philadelphia, Pennsylvania.
Abstract
OBJECTIVES: To quantify the prognostic importance of prefrailty and frailty in a population-based sample of cancer survivors. DESIGN: The Third National Health and Nutrition Examination Survey mortality-linked prospective cohort study. SETTING: Eighty-nine survey locations across the United States. PARTICIPANTS: Population-based sample of older adults (average age 72.2) with a self-reported diagnosis of non-skin-related cancer (N = 416). MEASUREMENTS: The primary outcome was all-cause mortality. Frailty components included low weight for height, slow walking, weakness, exhaustion, and low physical activity. Participants with none of the five criteria were classified as nonfrail, those with one or two as prefrail, and those with three or more as frail. RESULTS: The prevalence of prefrailty was 37.3% and of frailty was 9.1%. During a median follow-up of 11.2 years, 319 (76.7%) participants died. Median survival was 13.9 years for participants classified as nonfrail, 9.5 years for those classified as prefrail, and 2.5 years for those classified as frail. Cancer survivors classified as prefrail (hazard ratio (HR) = 1.84, 95% confidence interval (CI) = 1.28-2.65, P = .001) or frail (HR = 2.79, 95% CI = 1.34-5.81, P = .006) had a higher risk of premature mortality than those classified as nonfrail. CONCLUSION: Prefrailty and frailty are prevalent clinical syndromes that may confer greater risk of premature mortality in older adult cancer survivors. Identifying frail cancer survivors and targeting interventions for them may be a strategy to improve survival after cancer.
OBJECTIVES: To quantify the prognostic importance of prefrailty and frailty in a population-based sample of cancer survivors. DESIGN: The Third National Health and Nutrition Examination Survey mortality-linked prospective cohort study. SETTING: Eighty-nine survey locations across the United States. PARTICIPANTS: Population-based sample of older adults (average age 72.2) with a self-reported diagnosis of non-skin-related cancer (N = 416). MEASUREMENTS: The primary outcome was all-cause mortality. Frailty components included low weight for height, slow walking, weakness, exhaustion, and low physical activity. Participants with none of the five criteria were classified as nonfrail, those with one or two as prefrail, and those with three or more as frail. RESULTS: The prevalence of prefrailty was 37.3% and of frailty was 9.1%. During a median follow-up of 11.2 years, 319 (76.7%) participants died. Median survival was 13.9 years for participants classified as nonfrail, 9.5 years for those classified as prefrail, and 2.5 years for those classified as frail. Cancer survivors classified as prefrail (hazard ratio (HR) = 1.84, 95% confidence interval (CI) = 1.28-2.65, P = .001) or frail (HR = 2.79, 95% CI = 1.34-5.81, P = .006) had a higher risk of premature mortality than those classified as nonfrail. CONCLUSION: Prefrailty and frailty are prevalent clinical syndromes that may confer greater risk of premature mortality in older adult cancer survivors. Identifying frail cancer survivors and targeting interventions for them may be a strategy to improve survival after cancer.
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