title: Association of mortality with out-of-hours admission in patients with perforated peptic ulcer.
abstract: BACKGROUND
  Perforated peptic ulcer is a serious emergency surgical condition. The aim of the present nationwide cohort study was to evaluate the association between mortality and out-of-hours admission in patients surgically treated for perforated peptic ulcer.
  
  
  METHODS
  All Danish patients surgically treated for benign gastric or duodenal perforated peptic ulcer in Denmark between September 1, 2011 and August 31, 2013 were included. Patients were identified through The Danish Clinical Register of Emergency Surgery. The association between 90-day mortality and time and day of admission and surgery was assessed by crude and adjusted odds ratios (ORs) with 95% confidence intervals (CIs).
  
  
  RESULTS
  A total of 726 patients were included. Median age was 69.5 years (range 18.2-101.7), and 569 of the 726 patients (78.4%) had at least one coexisting disease. Adjusted ORs and 95% CIs between 90-day mortality and admission in daytime vs. nighttime and weekday vs. weekend were 1.0 (0.7-1.5) and 1.2 (0.8-1.8), respectively. Adjusted ORs with 95% CI between surgery in daytime vs. nighttime and weekday vs. weekend were 0.9 (0.6-1.3) and 1.2 (0.8-1.8), respectively. Sensitivity analysis was consistent with the primary analysis. The overall 90-day mortality rate was 25.6% (186/726).
  
  
  CONCLUSIONS
  No statistically significant adjusted association between 90-day mortality and out-of-hours admission was found in patients surgically treated for perforated peptic ulcer.
authors.affiliation: Department of Anesthesiology and Intensive Care Medicine, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark.
authors.forename: N V
authors.initials: NV
authors.lastname: Knudsen
authors.forename: M H
authors.initials: MH
authors.lastname: Møller
mesh_terms: D000293:Adolescent; D000328:Adult; D039602:After-Hours Care / Q000706:statistics & numerical data*; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D003718:Denmark / Q000453:epidemiology; D005260:Female; D017052:Hospital Mortality; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D010439:Peptic Ulcer Perforation / Q000401:mortality*; D055815:Young Adult