Giesinger K, Giesinger JM, Hamilton DF, et al. - This study attempted to explore the impact of body mass index (BMI) on improvement in pain, function, and general health status following total knee arthroplasty (TKA). Researchers conducted a single-centre retrospective analysis of primary TKAs performed between 2006 and 2016. They obtained data preoperatively and 12-month postoperatively using Western Ontario and McMaster Universities Osteoarthritis Index score and EQ-5D. They compared longitudinal score change across the BMI categories identified by the World Health Organization. The study examined a total of 1,565 patients [mean age 69.1, 62.2% women]. In comparison with normal-weight patients, post-operative improvement in joint-specific outcomes was larger in obese patients. These data imply that obese patients may have the greatest benefits from TKA with regard to function and pain relief one year post-op. It has been considered that well-balanced treatment decisions should fully account for both: Higher advantages in terms of pain relief and function as well as elevated potential risks and complications.