Worsening renal function during hospitalization in elderly patients with heart failure: an independent factor of activities of daily living decline.

This study aimed to clarify the effects of worsening renal function (WRF) during hospitalization on activities of daily living (ADL) at discharge of elderly heart failure (HF) patients. We included 323 consecutive patients hospitalized for HF who were prescribed phase I cardiac rehabilitation (CR) from November 2017 to April 2019. WRF was defined as a relative increase from baseline in serum creatinine of 25% or that in serum creatinine ≥ 0.