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External validation of the Hospital Frailty Risk Score in France

Gilbert, Thomas, Cordier, Quentin, Polazzi, Stéphanie, Bonnefoy, Marc, Keeble, Eilìs, Street, Andrew ORCID: 0000-0002-2540-0364, Conroy, Simon and Duclos, Antoine (2022) External validation of the Hospital Frailty Risk Score in France. Age and ageing, 51 (1). ISSN 1468-2834

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Identification Number: 10.1093/ageing/afab126


BACKGROUND: The Hospital Frailty Risk Score (HFRS) has made it possible internationally to identify subgroups of patients with characteristics of frailty from routinely collected hospital data. OBJECTIVE: To externally validate the HFRS in France. DESIGN: A retrospective analysis of the French medical information database. SETTING: 743 hospitals in Metropolitan France. SUBJECTS: All patients aged 75 years or older hospitalised as an emergency in 2017 (n = 1,042,234). METHODS: The HFRS was calculated for each patient based on the index stay and hospitalisations over the preceding 2 years. Main outcome measures were 30-day in-patient mortality, length of stay (LOS) >10 days and 30-day readmissions. Mixed logistic regression models were used to investigate the association between outcomes and HFRS score. RESULTS: Patients with high HFRS risk were associated with increased risk of mortality and prolonged LOS (adjusted odds ratio [aOR] = 1.38 [1.35-1.42] and 3.27 [3.22-3.32], c-statistics = 0.676 and 0.684, respectively), while it appeared less predictive of readmissions (aOR = 1.00 [0.98-1.02], c-statistic = 0.600). Model calibration was excellent. Restricting the score to data prior to index admission reduced discrimination of HFRS substantially. CONCLUSIONS: HFRS can be used in France to determine risks of 30-day in-patient mortality and prolonged LOS, but not 30-day readmissions. Trial registration: Reference ID on ID: NCT03905629.

Item Type: Article
Official URL:
Additional Information: © 2021 The Authors
Divisions: Health Policy
Subjects: R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
H Social Sciences > HT Communities. Classes. Races
H Social Sciences > HD Industries. Land use. Labor > HD61 Risk Management
Date Deposited: 10 Feb 2022 15:24
Last Modified: 24 May 2024 02:39

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