Incidence of gastroenteritis in Norway – a population-based survey
In 1999–2000 we conducted a one-year, retrospective population-based survey in Norway to estimate the incidence of gastroenteritis and study the association with selected exposures. A self-administered questionnaire was mailed to 3000 persons selected at random from the population registry, with 250 persons being contacted each month. The response rate was 61%. The incidence of acute gastroenteritis was 1·2 per person-year. The incidence was higher for women than for men. Of the total of 171 cases, 29 (17%) consulted a physician, 13 (8%) reported that a stool sample was taken, and 7 (4%) were admitted to hospital. Among children aged less than 15 years, drinking water from a private water supply was associated with illness, while using chlorinated water was protective. Among adults aged 20–40 years, travelling abroad was associated with illness. The incidence in our survey is similar to rates found by FoodNet in United States.(Accepted March 18 2003)
c1 Department for Infectious Disease Epidemiology, National Public Health Institute, Mannerheimintie 166, 00300 Helsinki, Finland.