Mahony GT, et al. - The aim of this study was to assess the patient-related factors for failure to achieve improvement following primary total shoulder arthroplasty (TSA) for osteoarthritis at 2 years postoperatively. Researchers discovered that previous shoulder surgery, a rotator cuff tear requiring repair during TSA, the presence of diabetes, surgery on the nondominant arm, and a higher baseline American Shoulder and Elbow Surgeons (ASES) score exhibited a link with a higher risk of failing to achieve improvement after anatomic TSA.