title: [Seasonal increase in gastroduodenal ulcer].
abstract: 7084 upper gastrointestinal tract endoscopies in the years 1973 to 1981 revealed 1664 duodenal or gastric ulcers. The number of total ulcer observations in relation to specific months differed between 110 in the 9 June periods and 189 in the 9 October months. A convincing peak was not detected. However, the number of ulcers per month or per season was not distributed evenly, as judged by chi-Square analysis. 30% of all ulcer observations occurred in the fall, 24% in the winter, 24% in the spring and 22% in the summer. Our material did not reveal, whether the slight increase in the fall reflected a true rise in the ulcer incidence or whether it had to be attributed to seasonal variations in referrals for endoscopic examinations. Nevertheless the reported data are further evidence for the perennial rather than seasonal nature of gastroduodenal ulcers.
mesh_terms: D004384:Duodenoscopy; D005773:Gastroscopy; D005860:Germany, West; D006801:Humans; D010437:Peptic Ulcer / Q000453:epidemiology*; D012189:Retrospective Studies; D012621:Seasons
vernacular_title: Untersuchungen zur saisonalen Häufung des Gastroduodenalulkus.