Percentage of patients 18 years of age and older who obtained an improvement of at least 1 minimal clinically important difference (MCIDO) in shoulder pain and/or function as measured by validated patient-reported outcome measures (PROMs) completed up to 90 days prior to and 9 to 15 months after undergoing primary total shoulder arthroplasty (TSA) surgery. PROMs include any validated measures of shoulder-related pain and/or function with MCID thresholds supported by literature, including PSS (11.4 points) and ASES (13.6 points).