Introduction: The factors associated with the recovery of activities of daily living (ADL) in elderly inpatients have not been clarified. This study aimed to investigate the factors associated with recovery of ADL in elderly inpatients with acute infectious disease who underwent rehabilitation during their hospitalization.

Methods: The study included patients ≥65 years of age who were hospitalized due to acute infectious disease and had undergone rehabilitation at Tsukuba Memorial Hospital. The main outcome was measured using the functional independence measure (FIM) scores to assess ADL, and the recovery rate of FIM was calculated. Furthermore, the factors associated with the recovery rate of FIM were evaluated by multiple regression analysis. Basic characteristics, length of stay, length from onset to starting rehabilitation, physical status (muscle strength and presence of urinary incontinence), and mental status (cognitive and depression) at the start of rehabilitation were included as the evaluation items.

Results: Among the 124 elderly inpatients with acute infectious disease (mean ± standard deviation age, 82.5±7.7), 56 were male and 68 were female. According to the multiple regression analysis, length from onset to starting rehabilitation (β=-0.03), presence of urinary incontinence (β=-0.29), and cognitive status (β=0.01) were factors associated with the recovery rate of FIM.

Conclusion: The study results suggest that length from onset to starting rehabilitation, presence of urinary incontinence, and cognitive status are important for elderly inpatients with acute infectious disease to return to their ADL.