• J Ryan Hill, Braden McKnight, William C Pannell, Nathanael Heckmann, Lakshmanan Sivasundaram, Amir Mostofi, Reza Omid, and George F Rick Hatch.
• Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.. Electronic address: hilljeff@usc.edu.
• Arthroscopy. 2017 Jan 1; 33 (1): 55-61.

PurposeThe purpose of this study was to evaluate a large population of shoulder arthroscopy cases in order to provide insight into the risk factors associated with readmission following this common orthopaedic procedure.MethodsThe American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) database was queried using current procedural terminology (CPT) billing codes to identify all patients older than 18 years of age who underwent shoulder arthroscopy between 2011 and 2013. Univariate and multivariate analyses were conducted to identify factors associated with 30-day readmission.ResultsWe identified 15,015 patients who had undergone shoulder arthroscopy, with a 30-day readmission rate of 0.98%. The most common reason for readmission was pulmonary embolism (0.09%). On multivariate analysis, operative time > 1.5 hours (odds ratio [OR], 1.80; 95% confidence interval [CI], 1.29 to 2.50), age 40 to 65 years (OR, 3.80; 95% CI, 1.37 to 10.59), age > 65 years (OR, 3.91; 95% CI, 1.35 to 11.35), American Society of Anesthesiologists (ASA) class 3 (OR, 4.53; 95% CI, 1.90 to 10.78), ASA class 4 (OR, 7.73; 95% CI, 2.91 to 27.25), chronic obstructive pulmonary disease (COPD; OR, 2.65; 95% CI, 1.54 to 4.55), and chronic steroid use (OR, 2.96; 95% CI, 1.46 to 6.01) were identified as independent risk factors for readmission.ConclusionsOperative time > 1.5 hours, age > 40 years, ASA classes 3 or 4, COPD, and chronic steroid use are independent risk factors for readmission following elective arthroscopic shoulder surgery, although the readmission rate following these procedures is low.Level Of EvidenceLevel III, retrospective comparative study.Copyright © 2016 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.

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