Physical Activity and Mobility Impairment Across the Frailty Spectrum Among the Oldest Old: Insights From the Brazilian Longitudinal Study of Aging (ELSI-Brazil).

This study analyzed data from the second wave of the Brazilian Longitudinal Study of Aging (ELSI-Brazil) to examine the prevalence of frailty and its association with physical activity (PA) and mobility impairments in a nationally representative sample of older adults aged 80 and older in Brazil. ELSI-Brazil is a national resource that investigates aging-related health, psychosocial, and economic factors to inform public policies promoting healthy aging. Data from 1,171 participants were analyzed using chi-square tests, ANOVA, and logistic regression adjusted for confounders. About 14% were classified as frail, 73% as pre-frail, and 13% as robust. Frail individuals were less likely to meet PA guidelines (OR = 12.95; 95% CI [6.44-26.08]) and had higher odds of short-distance walking impairment (OR = 1.88; 95% CI [1.02-3.48]) compared to their robust counterparts. Our findings suggest a relatively low prevalence of frailty among Brazil's oldest old but indicated a significant association with physical inactivity and mobility impairment.