Keulen MJF, Schotanus MGM, van Haaren EH, et al. - A retrospective analysis of 525 patients in a single institution was conducted to evaluate the rates and causes of 90-day complications and readmissions following outpatient hip and knee arthroplasty. A total of 525 patients (90 primary total hip arthroplasties, 277 primary total knee arthroplasties, and 158 primary UKAs), initially planned for outpatient joint arthroplasty (OJA) were included in the study. Researchers compared complications and readmissions by the length of stay: same-day discharge (SDD) versus ≥ 1 day. The log-rank test was applied to evaluate differences. Multivariable logistic regression analysis was applied to evaluate complications and readmission risk. In comparison with a prolonged hospital stay, SDD following OJA did not result in more complications and hospital readmissions. It was indicated that the majority of complications and readmissions were due to noninfected wound discharge.