External validation of the hospital frailty risk score among hospitalised home care clients in Canada: a retrospective cohort study.

Background: The Hospital Frailty Risk Score (HFRS) is scored using ICD-10 diagnostic codes in administrative hospital records. Home care clients in Canada are routinely assessed with Resident Assessment Instrument-Home Care (RAI-HC) which can calculate the Clinical Frailty Scale (CFS) and the Frailty Index (FI).

Objective: Measure the correlation between the HFRS, CFS and FI and compare prognostic utility for frailty-related outcomes.