Ponnusamy KE, et al. - Among 6 BMI cohorts, authors estimated the cost-effectiveness of performing total hip arthroplasty (THA) vs nonoperative management (NM). In order to compare the cost-utility of THA and NM in the six BMI groups over a 15-year period, they constructed a state-transition Markov model. Findings suggested that THA would be cost effective for all obesity levels, even at a willingness-to-pay threshold of $50,000/QALY, which is considered low for the United States. But unnecessary loss of healthcare access may be led by BMI cut-offs for THA.