Relationship between development trajectories of leisure activity and sleep time on incident cognitive impairment: A study based on the Chinese Longitudinal Healthy Longevity Survey (CLHLS).

Background: Leisure activity and sleep time are key factors in cognitive impairment, but the impact of their long-term trajectories on incident cognitive impairment remains unclear.

Objective: To examine the association of leisure activity trajectories, sleep time trajectories and their combined effects with incident cognitive impairment in older adults.

Methods: Data from the Chinese Longitudinal Healthy Longevity Survey (2008-2018) were analyzed, including adults aged ≥65 who participated in at least three surveys.