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The Bone & Joint Journal
Vol. 102-B, Issue 6 | Pages 683 - 692
1 Jun 2020
Arnold N Anis H Barsoum WK Bloomfield MR Brooks PJ Higuera CA Kamath AF Klika A Krebs VE Mesko NW Molloy RM Mont MA Murray TG Patel PD Strnad G Stearns KL Warren J Zajichek A Piuzzi NS

Aims

Thresholds for operative eligibility based on body mass index (BMI) alone may restrict patient access to the benefits of arthroplasty. The purpose of this study was to evaluate the relationship between BMI and improvements in patient-reported outcome measures (PROMs), and to determine how many patients would have been denied improvements in PROMs if BMI cut-offs were to be implemented.

Methods

A prospective cohort of 3,449 primary total hip arthroplasties (THAs) performed between 2015 and 2018 were analyzed. The following one-year PROMs were evaluated: 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). Positive predictive values for failure to improve and the number of patients denied surgery in order to avoid a failed improvement were calculated for each PROM at different BMI cut-offs.