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• W2802007462 abstract "Objective: To develop and validate a preoperative frailty index (pFI) for use in population-based health administrative (HA) data. Summary Background Data: Frailty is a robust predictor of adverse postoperative outcomes. Population-level frailty measures used in surgical studies have significant methodological limitations. Frailty indices (FIs) are a well-defined approach to measuring frailty with well-described methods for development and evaluation. An appropriate preoperative FI in HA data has not been derived or evaluated. Methods: Retrospective cohort study using linked HA data in Canada. We identified people >65 years (2002–2015) who had major elective or emergency surgery. Standardized methods were used to construct a 30-variable pFI. Unadjusted and multilevel, multivariable adjusted models were used to measure the association of the pFI with 1-year mortality and institutional discharge. Elective patients were the derivation cohort, emergency patients were the validation cohort. Prespecified sensitivity analyses were performed. Results: We identified 415,704 elective, and 95,581 emergency patients. The elective 1-year mortality rate was 4.7%. Thirty percent of population-level deaths occurred in people with frailty. Every 0.1-unit increase in the pFI was associated with a 2.20-fold increase in the adjusted odds of mortality (95% CI 2.15–2.26; c-statistic 0.81), and a 1.70-fold increase in institutional discharge (95% CI 1.59–1.80; c-statistic 0.71). pFI performance was similar in emergency patients, and was robust to changes in index composition. Conclusions: A preoperative FI derived from HA data is a robust method to measure frailty in elective and emergency patients. Generalizable FIs should be considered a standard approach to population-level study of surgical frailty." @default.
• W2802007462 created "2018-05-17" @default.
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• W2802007462 date "2019-07-01" @default.
• W2802007462 modified "2023-10-13" @default.
• W2802007462 title "Derivation and Validation of a Generalizable Preoperative Frailty Index Using Population-based Health Administrative Data" @default.
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• W2802007462 doi "https://doi.org/10.1097/sla.0000000000002769" @default.
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