title: Seasonal periodicity of perforated gastric ulcer.
abstract: The seasonal periodicity of perforated peptic ulcer of the stomach was analysed among 296 patients operated at seven departments of gastrointestinal surgery in Denmark between 1975 and 1984. Admissions were significantly higher in August and September with a tendency, although not significant, in March also. This pattern was unaffected by age and sex.
authors.affiliation: Department of Gastrointestinal Surgery D, Glostrup Hospital, University of Copenhagen, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Christensen
authors.forename: C P
authors.initials: CP
authors.lastname: Hansen
authors.forename: C
authors.initials: C
authors.lastname: Thagaard
authors.forename: C
authors.initials: C
authors.lastname: Lanng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology*; D010507:Periodicity; D012621:Seasons; D013276:Stomach Ulcer / Q000453:epidemiology*