Descriptive Epidemiology of the MOON Shoulder Instability Cohort

Background:Shoulder instability is a common diagnosis among patients undergoing shoulder surgery.Purpose:To perform a descriptive analysis of patients undergoing surgery for shoulder instability through a large multicenter consortium.Study Design:Case series; Level of evidence, 4.Methods:All patients undergoing surgery for shoulder instability who were enrolled in the MOON Shoulder Instability Study were included. Baseline demographics included age, sex, body mass index, and race. Baseline patient-reported outcomes (PROs) included the American Shoulder and Elbow Surgeons (ASES) score, Shoulder Activity Score, Western Ontario Shoulder Instability Index (WOSI), 36-Item Health Survey (RAND-36), and Single Assessment Numeric Evaluation (SANE). The preoperative physician examination included active range of motion (ROM) and strength testing. Preoperative imaging assessments with plain radiography, magnetic resonance imaging (MRI), and computed tomography were also included and analyzed.Results:Twenty-six surge...