Age-related differences in the effectiveness of rehabilitation to improve activities of daily living in patients with stroke: A cross-sectional study.

Abstract

This study aimed to reveal differences in the effectiveness of rehabilitation in improving activities of daily living (ADL) in patients with acute stroke across age groups and propose age-appropriate rehabilitation strategies. This observational study analyzed nationwide administrative data of inpatients admitted to hospitals with acute stroke between April 1, 2018, and March 31, 2020. The data included the average length of daily rehabilitation sessions, weekly frequency of rehabilitation sessions, and initiation of rehabilitation within three days. The primary outcome was the improvement in the Barthel Index (BI) score from admission to discharge. We classified the patients based on age and analyzed improvements in ADL according to rehabilitation characteristics. An increased daily rehabilitation dose was associated with improved ADL, except in patients aged <65 years (risk ratios and 95% confidence intervals [CIs] in the 65-74, 75-85, and ≥85 age groups: 1.20 [1.14‒1.27], 1.21 [1.15‒1.27], and 1.43 [1.34‒1.53], respectively; all p <0.001 vs. <65 years: 1.05 [0.98-‒1.12]; p=0.18). A rehabilitation frequency of seven sessions per week was associated with improved ADL in the 75-85-year and ≥85-year age groups (1.06 [1.02‒1.10] and 1.08 [1.03‒1.13], respectively; both p <0.001). The effects of initiating rehabilitation within three days on ADL post-admission did not differ across age groups. Increasing the daily dose of rehabilitation was significantly associated with improved ADL in all age groups while increasing the frequency of rehabilitation per week improved ADL in older and very old patients.