DASC‐21 score and risk of rehospitalization and all‐cause mortality after discharge in older patients with heart failure

Aim The impact of cognitive dysfunction‐associated activities of daily living (ADL) on mortality and rehospitalization for heart failure has not yet been evaluated. Methods We retrospectively evaluated DASC‐21, the incidence of all‐cause mortality, and rehospitalization for heart failure after discharge in 329 older patients with heart failure. Results The mean age was 85.1 ± 7.4 years (62.6% women). There were 110 cases of death from any cause (33.4%) during 25.5 ± 16.1 months of follow‐up and 166 cases of rehospitalization from heart failure (50.5%) during 16.1 ± 15.2 months of follow‐up. The DASC‐21 score was not significantly associated with an increased risk of all‐cause mortality or rehospitalization. For each item of the DASC‐21 questionnaire, defective route‐finding (item 6) (HR = 2.631, P = 0.003), common sense and capacity for judgement (item 9) (HR = 1.717, P = 0.040), instrumental ADL (IADL) for shopping (item 10) (HR = 1.771, P = 0.020), and IADL for meal preparation (item 14) (HR = 1.790, P = 0.019) were significantly associated with an increased risk of all‐cause mortality. Disabilities in route finding (HR = 2.257, P = 0.005), IADL for shopping (HR = 1.632, P = 0.016), and IADL for transportation (HR = 1.537, P = 0.033) were significant risk factors for rehospitalization due to heart failure. Even in the multivariate‐adjusted model, disability in defective route‐finding was significantly associated with an increased risk of all‐cause mortality (hazard ratio [HR] = 2.148, 95% confidence interval [CI] 1.090–4.236; P = 0.027) and of rehospitalization for heart failure (HR = 2.138, 95% CI 1.153–3.963, P = 0.016). Conclusions In older patients hospitalized for heart failure, route disability was associated with all‐cause mortality and rehospitalization for heart failure after discharge. Geriatr Gerontol Int 2024; 24: 1130–1136. In older patients hospitalized for heart failure, DASC‐21 score, especially basic activities of daily living (ADL), was significantly associated with in‐hospital death, longer hospital stay, and lower quality of life. After discharge, instrumental ADL, especially disability in route‐finding, was associated with risk of all‐cause death and heart failure rehospitalization.