Ondeck NT, et al. - Authors sought to compare the predictive ability of the American Society of Anesthesiologists (ASA) class, modified Charlson Comorbidity Index, modified Frailty Index, and demographic characteristics for general health complications following total hip arthroplasty (THA). Comorbidity indices and demographics from National Surgical Quality Improvement Program THA patients were evaluated for discriminative ability in predicting adverse outcomes. A greater predictivity of perioperative adverse outcomes for THA was seen with effortlessly obtained patient ASA and age vs the more complex and numerically tabulated modified Charlson Comorbidity Index and modified Frailty Index.