title: Of 20,376 Lumbar Discectomies, 2.6% of Patients Readmitted Within 30 Days: Surgical Site Infection, Pain, and Thromboembolic Events Are the Most Common Reasons for Readmission.
abstract: METHODS
  A retrospective cohort study of prospectively collected data.
  
  
  OBJECTIVE
  As an initial effort to address readmissions after lumbar discectomy, reasons for hospital readmission are identified and discussed.
  
  
  BACKGROUND
  Lumbar discectomy is a commonly performed procedure. The Affordable Care Act codifies penalties for hospital readmissions. New quality-based reimbursements tied to readmissions call for a better understanding of the causes of readmission after procedures such as lumbar discectomy.
  
  
  METHODS
  Lumbar discectomies performed in 2012 to 2014 were identified in the American College of Surgeons National Surgical Quality Improvement Program database. Patient demographics, surgical variables, and reasons for readmissions within 30 days were recorded. Pearson chi square was used to compare rates of demographics and surgical variables between readmitted and nonreadmitted patients. Multivariate regression was used to identify risk factors for readmission.
  
  
  RESULTS
  Of 20,376 lumbar discectomies, 533 patients (2.62%) were readmitted within 30 days of surgery. The most common reasons for readmission were surgical site infections (n = 130, 0.64% of all discectomies, 24.4% of all readmissions), followed by pain issues (n = 89, 0.44%, 16.7%), and thromboembolic events (43, 0.21%, 8.1%). Overall time to readmission was 13.0 ± 8.0 days (mean ± standard deviation). Factors most associated with readmission after lumbar discectomy were higher American Society of Anesthesiologists class (relative risk = 1.49, P < 0.001) and prolonged operative time (relative risk = 1.41, P = 0.002).
  
  
  CONCLUSIONS
  Surgical site infection, postoperative pain, and thromboembolic events were the most common reasons for readmission after lumbar discectomy. These findings identify potential areas for quality improvement initiatives.
  
  
  METHODS
  3.
authors.affiliation: Department of Orthopedic Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA.
authors.forename: Matthew L
authors.initials: ML
authors.lastname: Webb
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Nelson
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Ameya V
authors.initials: AV
authors.lastname: Save
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Cui
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Adam M
authors.initials: AM
authors.lastname: Lukasiewicz
authors.affiliation: Department of Orthopedic Surgery, Hospital for Special Surgery, Weill Cornell Medical College, Cornell University, New York, NY.
authors.forename: Andre M
authors.initials: AM
authors.lastname: Samuel
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Pablo J
authors.initials: PJ
authors.lastname: Diaz-Collado
authors.affiliation: Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL.
authors.forename: Daniel D
authors.initials: DD
authors.lastname: Bohl
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Nathaniel T
authors.initials: NT
authors.lastname: Ondeck
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Ryan P
authors.initials: RP
authors.lastname: McLynn
authors.affiliation: Department of Orthopedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
authors.forename: Jonathan N
authors.initials: JN
authors.lastname: Grauer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D017586:Diskectomy / Q000009:adverse effects* / Q000379:methods; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D008875:Middle Aged; D061646:Operative Time; D010146:Pain / Q000209:etiology*; D010359:Patient Readmission; D058996:Quality Improvement; D012189:Retrospective Studies; D012307:Risk Factors; D013530:Surgical Wound Infection / Q000209:etiology*; D013923:Thromboembolism / Q000209:etiology*; D055815:Young Adult