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Rates of 30-day serious morbidity by American Society of Anesthesiologists (ASA) classification, Charlson comorbidity index (CCI) and modified frailty index (mFI). ASA classification and the CCI were not predictors of serious morbidity on multivariate analyses. *Patients with an mFI score of ≥5 had a greater risk of serious morbidity compared to nonfrail patients (p=0.02).
