Résumé :
|
[BDSP. Notice produite par INIST-CNRS kR0xHsI8. Diffusion soumise à autorisation]. Low 25-hydroxyvitamin D (25 (OH) D) concentrations are common among older adults and are associated with poorer physical performance and strength, but results from longitudinal studies have been inconsistent. The 25 (OH) D threshold for physical performance and strength was determined, and both cross-sectional and longitudinal associations between 25 (OH) D and physical performance and strength were examined, in men and women aged 71-80 years from the Health, Aging, and Body Composition Study (n=2,641). Baseline serum 25 (OH) D was measured in 1998-1999, and physical performance and strength were measured at baseline and at 2and 4-year follow-up. Piecewise regression models were used to determine 25 (OH) D thresholds. Linear regression and mixed models were used to examine cross-sectional and longitudinal associations. The 25 (OH) D thresholds were 70-80 nmol/L for physical performance and 55-70 nmol/L for strength. Participants with 25 (OH) D75 nmol/L (P
|