“…Our Institutional Review Board approved this study, and we adhered to the ACS-NSQIP data use agreement. We used the RAI-rev, 6 a simple-to-administer 11-item questionnaire that assesses 5 domains of frailty, including social, physical, cognitive, nutritional, and functional aspects, and the mFI-5, 4 which is based on a 5-factor index: diabetes, chronic obstructive pulmonary disease, functional dependency, congestive heart failure, and hypertension (Table ), to classify patients into 1 of 4 categories: robust, typical, frail, and very frail. We present descriptive statistics and receiver operator characteristic comparisons for RAI-rev, mFI-5, greater patient age, and BMI.…”