Roth A, et al. - Authors studied 18,866 subjects to assess the influence of body mass index (BMI) on 30-day complications after aseptic revision total knee arthroplasty (rTKA) and aseptic revision total hip arthroplasty (rTHA). They found an increase in BMI causing an incline in both readmission rates and reoperation rates for rTKA. A linear relationship between BMI and readmission rates for rTKA was also noticed. They reported a relation of morbid obesity with an improved reoperation rate for rTHA. Although, they found no statistically significant improvement in readmission or reoperation rates as BMI increased for rTHA in a multivariate analysis. A J-shaped curve with the lowest rates of complications occurring around a BMI of 30 kg/m² was revealed as the relationship between BMI and complications after revision total joint arthroplasty. They noted a stronger relationship between BMI and perioperative complications for revision TKA than revision THA.