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American Journal of Epidemiology Vol. 111, No. 6: 713-720
Copyright © 1980 by The Johns Hopkins University School of Hygiene and Public Health

research-article

RECENT CHANGES IN THE INCIDENCE OF DUODENAL AND GASTRIC ULCER1

THOMAS M. VOGT and RICHARD E. JOHNSON

address for reprints

The incidence of duodenal and gastric ulcer was examined in a Health Maintenance Organization with over 200,000 members. Hospitalization data were available from 1966 through 1975, and outpatient data from 1967 through 1973. Outpatient episodes of duodenal ulcer declined from 21.0 ± 3.6 episodes per 1000 male person years (PY) in 1967 to 6.6 ± 1.5 per 1000 male PY in 1973, and from 9.4 ± 2.4 episodes per 1000 female PY in 1967 to 4.1 ± 0.8 per 1000 female PY in 1973. Similar declines were observed in the hospitalization data. There were slight declines in gastric ulcer rates, but these were not significant except for a decrease in male gastric ulcer hospitalizations. The decrease in duodenal ulcer incidence has no readily apparent explanation.

duodenal ulcer; gastroduodenal ulcer; peptic ulcer

1From the Health Services Research Center, Kaiser Foundation Hospitals, 4610 S. E. Belmont Street, Portland, OR 97215.


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