Vogt T M, Johnson R E
Am J Epidemiol. 1980 Jun;111(6):713-20. doi: 10.1093/oxfordjournals.aje.a112949.
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.
在一个拥有超过20万名成员的健康维护组织中，对十二指肠溃疡和胃溃疡的发病率进行了调查。可获取1966年至1975年的住院数据，以及1967年至1973年的门诊数据。十二指肠溃疡的门诊发病率从1967年每1000男性人年（PY）21.0±3.6次下降到1973年每1000男性PY 6.6±1.5次，从1967年每1000女性PY 9.4±2.4次下降到1973年每1000女性PY 4.1±0.8次。住院数据中也观察到了类似的下降。胃溃疡发病率略有下降，但除男性胃溃疡住院人数减少外，这些下降并不显著。十二指肠溃疡发病率的下降没有明显的解释。
