Crawford DA, Hurst JM, Morris MJ, et al. - Given a rapidly increasing shift toward outpatient joint arthroplasty, researchers here examined if morbid obesity is a risk factor for perioperative complications after outpatient joint arthroplasty. From 2013 to 2017, all outpatient primary total hip (THA), total knee (TKA), partial knee (PKA) and revision hip and knee arthroplasties were retrospective reviewed yielding a cohort of 4,863 patients (5,988 arthroplasty procedures). Among these, 4,870 arthroplasties were performed in non-morbidly obese individuals and 1,118 arthroplasties were performed in the morbidly obese individuals. Outcomes revealed no increased risk of 90-day medical complications, readmission or revisions after outpatient arthroplasty among morbidly obese patients. However, a significantly higher incidence of overnight stay was reported for morbidly obese patients.