Figure 3.

Rates of admission per million London residents of males (M) and females (F) with gastric (GU) and duodenal (DU) ulcer to St Bartholomew's Hospital, London, 1872–1920, during which period the mean necropsy rate was 79%. Age and sex specific rates were calculated for each five year period and 10 year age group per million living London residents, using the method of direct standardisation to adjust the rates of different time periods to the age distribution of the census population of London from 1921.