Shearer J, et al. - This study was sought to assess previously used measures of evaluating knee adiposity and ascertain the best measure for predicting both surgical duration and periprosthetic joint infection (PJI) after total knee arthroplasty (TKA). Between January 2013 and December 2016, researchers conducted a multicentre retrospective review of 4,745 individuals who underwent primary TKA. They collected individual demographic information, surgical duration, and postoperative infection status within one year. They examined preoperative weight-bearing AP and lateral x-rays to ascertain prepatellar adipose thickness, bony width of the tibial plateau, and total soft tissue knee width. They estimated knee adipose index (KAI) from the ratio of bone to total knee width. It was indicated that local adipose deposition varies greatly for any given BMI. The study found that BMI was a more reliable predictor of PJI after TKA than local measures of knee adipose tissue.