Anis HK, et al. - Researchers intended to compare the properties of primary total knee arthroplasty (TKA) individuals at high-, intermediate-, and low-volume hospitals. A sum of 12,541 primary TKA individuals were enrolled in risk groups based on age (>65 years), body mass index (BMI; >40), and Charlson Comorbidity Index (CCI; ≥4). The association between baseline patient characteristics and hospital volume was evaluated by using multivariate logistic regression models. This research observed TKA individuals at high-volume centers have significantly different baseline features to those at lower volume centers. When comparing primary TKA outcomes between centers, the data demonstrates the significance of considering hospital volume status and the associated disparity in the preoperative risk of individuals.