Association between frailty and physical function recovery of people who received physiotherapy early rehabilitation during acute hospitalisation: An observational cohort study.

Objectives: Examine the effect of frailty on physical function recovery in people admitted to hospital who received a physiotherapy Early Rehabilitation program.

Methods: Observational cohort (1 January 2021 to 31 December 2021). Patients admitted to the acute site at Austin Health, Australia who received an Early Rehabilitation program (targeted physical rehabilitation to address goals aligned to physiotherapy intervention in parallel with acute medical treatment) were eligible. Frailty was measured with the Clinical Frailty Scale (CFS). The primary outcome was, across the CFS, magnitude of change from admission to discharge in physical function assessed with the modified Iowa Level of Assistance Scale (mILOA). Secondary outcomes were length of stay and discharge destination. Generalised additive models were used.

Results: There were 674 patients included in the study. Irrespective of frailty status, mean improvement in physical function from admission to discharge exceeded the minimal datable change of 5.8 points for the mILOA. Larger average improvements in mILOA were observed in patients with lower degrees of frailty (p < 0.001 overall effect), where a portion of patients with severe frailty did not make clinically meaningful gains in physical function following Early Rehabilitation. Mean improvement in physical function and predicted probabilities for discharge home were similar; where greater frailty severity was associated with a lesser chance of going home at acute hospital discharge (p = 0.002 overall effect).

Conclusions: Validating the link between predictions for change in physical function and discharge home in people receiving early rehabilitation during acute hospitalisation would be of great clinical utility.