140 Does Needle Penetration of the Shoulder Joint Prior to Arthroscopy Increase Infection Risk? The Effect of Preoperative Magnetic Resonance Arthrogram or Corticosteroid Injection

141 Social Determinants of Health Disparities are Associated with Increased Costs, Revisions, and Infection in Patients Undergoing Arthroscopic Rotator Cuff Repair

142 Psychological Distress is a Stronger Driver of Shoulder Pain and Function than Tear Severity in Patients Undergoing Rotator Cuff Repair

143 Unsupervised Machine Learning to Identify Clinically Meaningful Subgroups in Patients Undergoing Arthroscopic Rotator Cuff Repair

144 Identification of Rare Candidate Genetic Variants Associated with Rotator Cuff Tearing