Arnold N, Anis H, Barsoum WK, et al. - This research was intended to assess the association between BMI and improvements in patient-reported outcome measures (PROMs), and to ascertain how many patients would have been denied improvements in PROMs if BMI cut-offs were to be implemented. Researchers conducted a prospective cohort including a total of 3,449 primary total hip arthroplasties (THAs) between 2015 and 2018. They assessed following one-year PROMs: hip injury and osteoarthritis outcome score (HOOS) pain, HOOS Physical Function Shortform (PS), University of California, Los Angeles (UCLA) activity, Veterans Rand-12 Physical Component Score (VR-12 PCS), and VR-12 Mental Component Score (VR-12 MCS). They estimated positive predictive values for failure to improve and the number of patients denied surgery in order to avoid a failed improvement for each PROM at different BMI cut-offs. The data suggested that in PROMs, patients with higher BMIs exhibit greater improvements. Applying BMI alone to ascertain eligibility criteria did not improve the rate of clinically meaningful improvements. It was observed that BMI thresholds prevent patients who may benefit the most from surgery from undergoing THA. The data suggested that for THA, surgeons should recognize PROMs improvements in ascertaining eligibility while balancing traditional metrics of preoperative risk stratification.