Evans JT, Mouchti S, Blom AW, et al. - This study was undertaken to explore the relationships between body mass index (BMI) and revision surgery, mortality, and pain/function using what researchers believe to be the world’s largest joint replacement registry. Between 2005 and 2016, researchers examined 493,710 total knee replacements (TKRs) in the National Joint Registry for England, Wales, Northern Ireland, and the Isle of Man to evaluate 90-day mortality and 10-year cumulative revision. Given revision estimates in all BMI groups below the recognized threshold, no proof of elevated mortality, and difference in change in Oxford Knee Score below the minimal detectable change, this large national registry demonstrates no data of poorer outcomes in patients with high BMI. In addition, this research does not support the rationing of TKR based on elevated BMI.