Dose of physical activity, physical functioning and disability risk in mobility-limited older adults: Results from the LIFE study randomized trial
Change in SPPB score compared to baseline SPPB score at 6, 12, and 24 months according to quartiles of change in physical activity by accelerometry from baseline to 24 months, (a.) physical activity arm alone and (b.) entire group combined (least square means ± SE). Overall effect P < 0.0001. Effects within each time point all P < 0.01(physical activity arm); Effects within each time point all P < 0.06 (month 6, P = 0.06, months 12 and 24, P < 0.0001) (entire group).