Association Between Body Mass Index and Thirty-Day Complications After Total Knee Arthroplasty

Obesity increased the risk of readmission and various complications after TKA, with the risk being dependent on the severity of obesity. Relationships between BMI and complications showed considerable variations with some outcomes like readmission and reoperation showing a U-shaped relationship. Based on our findings, a potential BMI goal in weight management for obese patients could be established around 29-30 kg/m2, in order to decrease the risk of most TKA postoperative complications.