A Modified Frailty Index Predicts Complication, Readmission, and 30-Day Mortality Following the Revision Total Hip Arthroplasty

This study aimed to develop a modified frailty index (MFI) to predict the risks of revision total hip arthroplasty (THA). Data from the American College of Surgeons - National Surgical Quality Improvement Program were analyzed for patients who underwent revision THA from 2015 to 2020. An MFI was composed of the risk factors, including severe obesity (body mass index > 35), osteoporosis, non-independent function status prior to surgery, congestive heart failure within 30 days of surgery, hypoalbuminemia (serum albumin < 3.5), hypertension requiring medication, type 1 or type 2 diabetes, and a history of chronic obstructive pulmonary disease or pneumonia. The patients were assigned based on the MFI scores (MFI0, no risk factor; MFI1, 1–2 risk factors; MFI2, 3–4 risk factors; and MFI3, 5+ risk factors). Confidence intervals were set at 95