1. Low physical function predicts either 2-year weight loss or weight gain in healthy community-dwelling older adults. The NuAge longitudinal study
- Author
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St-Arnaud-McKenzie, Danielle, Payette, Helene, and Gray-Donald, Katherine
- Subjects
Aged -- Physiological aspects ,Body weight -- Research ,Health ,Seniors - Abstract
Objectives. Weight change in older adults affects physical function (PF). However, data suggest that, conversely, PF may be a determinant of weight change. Our objective was to assess the role of baseline PF as a predictor of 2-year weight loss (WL) and weight gain (WG) [greater than or equal to] 5% among healthy well-functioning community-dwelling older adults. Methods. The NuAge cohort (67-84 years) was classified into three groups according to the percent weight change over a 2-year follow-up: weight stable (weight change [less than or equal to] 2%: n = 629), WL [greater than or equal to] 5% (n = 189), and WG [greater than or equal to] 5% (n = 111). A summary measure of baseline PF was computed (sum of biceps, quadriceps, and grip strength, timed up and go, chair stand, normal and maximal gait speed, and balance performance scores [individual test score range = 0-4]; PF score range = 0-32). Multivariable logistic regression models separately assessed the relationships between baseline PF and 2-year WL and WG [greater than or equal to] 5%. Results. Baseline PF was worse in both the WL (p < .001) and the WG (p = .001) groups compared with the weight stable group. In models adjusting for sex, age, body mass index, energy intake, depressive symptoms, and other significantly associated covariates, each 1-unit increase in standard deviation of PF was associated with decreased risk of either 2-year WL (odds ratio = 0.79, 95% CI = 0.63-0.99, p = .043) or WG (odds ratio = 0.74, 95% CI = 0.55 0.99, p = .041). Conclusions. Low baseline PF was an independent common predictor of 2-year WL and WG [greater than or equal to] 5% in the healthy well-functioning community-dwelling elderly population. Whether PF is an early cause or marker of weight change in this population remains to be determined. Key Words: Elderly--Physical function--Weight loss--Weight gain--Longitudinal study. doi: 10.1093/geroa/glq150
- Published
- 2010