Longitudinal Relationship Between Physical Frailty And Cognitive Decline Among Older Chinese Immigrants

TL;DR

This study found that physical frailty in older Chinese immigrants is linked to faster cognitive decline over eight years, with language and frailty patterns affecting outcomes.

Contribution

The study identifies distinct physical frailty patterns and their longitudinal associations with cognitive decline in older Chinese immigrants.

Findings

Increased and constant frailty classes showed worse initial cognition and faster decline.

Mandarin speakers had slower cognitive decline compared to Cantonese speakers.

Language and frailty patterns are linked to cognitive outcomes in older Chinese immigrants.

Abstract

This study examined patterns of physical frailty changes, their sociocultural correlates, and associations with baseline cognitive functioning and cognitive decline over an eight-year observation period among older Chinese immigrants. Using five waves of data from the Population Study of Chinese Elderly in Chicago (PINE), this study included 2,835 respondents with a mean age of 72.5 years. Physical frailty was assessed using five indicators across the five waves, and repeated measures latent class analysis (RMLCA) identified four distinct frailty patterns: least frail (53%), decreased frailty (21%), increased frailty (15%), and constantly frail (11%). The associations between frailty patterns and cognitive change trajectories were evaluated using latent growth curve modeling (LGCM), adjusted for sociodemographic, health, and immigration covariates. The results indicated that, compared to the least frail class, respondents in the increased frailty class (intercept: B = -0.108, p < .05; slope: B = -0.073, p < .001) and the constantly frail class (intercept: B = -0.150, p < .01; slope: B = -0.043, p < .001) showed poorer initial cognitive functioning and faster rates of cognitive decline after controlling for covariates. No significant differences in cognitive outcomes were observed between the least frail and the decreased frailty classes. Compared to Cantonese speakers, Mandarin speakers experienced a slower rate of cognitive decline (B = 0.033, p < .001). These findings demonstrate that physical frailty is associated with cognitive decline, highlighting the need for clinical interventions with special attention to older Chinese immigrants who remain constantly frail or experience increasing frailty over time.