title: Unplanned readmission after appendectomy.
abstract: BACKGROUND
  Unplanned readmission of patients who undergo appendectomy is a relatively frequent occurrence. Our aim was to report the most common reasons and the predictors of unplanned readmission after appendectomy.
  
  
  METHODS
  The National Surgical Quality Improvement Program database was used to examine the clinical data of patients undergoing emergent and/or urgent appendectomy during 2012 to 2013. Multivariate regression analysis was performed to identify the predictors of unplanned readmission.
  
  
  RESULTS
  We evaluated a total of 46,960 patients who underwent appendectomy. Of these, 18.5% had perforated appendicitis. Overall, 1,755 (3.7%) of patients had an unplanned readmission. The most common reasons for readmission were intra-abdominal infection (27.3%), nonspecific abdominal pain (7.9%), and paralytic ileus (4.6%). Factors such as perforated appendicitis (adjusted odds ratio [AOR], 1.38; P < .01), preoperative sepsis (AOR, 1.30; P < .01), and dirty surgical wound (AOR, 1.91; P < .01) were associated with unplanned readmission.
  
  
  CONCLUSIONS
  Overall, 3.7% of patients who underwent emergent appendectomy had an unplanned readmission. Intra-abdominal infections and nonspecific abdominal pain are the most common reasons for readmission. Unplanned readmissions are predominantly related to postoperative complications and severity of disease.
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA.
authors.forename: Zhobin
authors.initials: Z
authors.lastname: Moghadamyeghaneh
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA.
authors.forename: Grace
authors.initials: G
authors.lastname: Hwang
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA.
authors.forename: Mark H
authors.initials: MH
authors.lastname: Hanna
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA.
authors.forename: Joseph C
authors.initials: JC
authors.lastname: Carmichael
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA.
authors.forename: Steven
authors.initials: S
authors.lastname: Mills
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA.
authors.forename: Alessio
authors.initials: A
authors.lastname: Pigazzi
authors.affiliation: Department of Surgery, University of California, Irvine, School of Medicine, 333 City Boulevard West Suite 1600, Irvine, CA, 92868, USA. Electronic address: mstamos@uci.edu.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Stamos
mesh_terms: D000328:Adult; D001062:Appendectomy / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D010359:Patient Readmission / Q000706:statistics & numerical data*; D011183:Postoperative Complications / Q000453:epidemiology* / Q000628:therapy; D058996:Quality Improvement; D012189:Retrospective Studies; D012307:Risk Factors; D014481:United States / Q000453:epidemiology
keywords: Appendectomy; Readmission; Unplanned readmission