title: Risk Factors for 30-Day Readmission Following Shoulder Arthroscopy.
abstract: OBJECTIVE
  The 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.
  
  
  METHODS
  The 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.
  
  
  RESULTS
  We 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.
  
  
  CONCLUSIONS
  Operative 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.
  
  
  METHODS
  Level III, retrospective comparative study.
authors.affiliation: 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.
authors.forename: J Ryan
authors.initials: JR
authors.lastname: Hill
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.
authors.forename: Braden
authors.initials: B
authors.lastname: McKnight
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.
authors.forename: William C
authors.initials: WC
authors.lastname: Pannell
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.
authors.forename: Nathanael
authors.initials: N
authors.lastname: Heckmann
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.
authors.forename: Lakshmanan
authors.initials: L
authors.lastname: Sivasundaram
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.; Huntington Memorial Hospital, Pasadena, California, U.S.A.
authors.forename: Amir
authors.initials: A
authors.lastname: Mostofi
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.
authors.forename: Reza
authors.initials: R
authors.lastname: Omid
authors.affiliation: Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, California, U.S.A.
authors.forename: George F
authors.initials: GF
authors.lastname: Rick Hatch
mesh_terms: D000328:Adult; D000368:Aged; D001182:Arthroscopy / Q000009:adverse effects*; D002140:California / Q000453:epidemiology; D016208:Databases, Factual; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D016017:Odds Ratio; D010359:Patient Readmission; D011183:Postoperative Complications / Q000453:epidemiology* / Q000209:etiology; D058996:Quality Improvement; D012189:Retrospective Studies; D012307:Risk Factors; D019534:Shoulder Impingement Syndrome / Q000601:surgery*