title: Population distribution and burden of acute gastrointestinal illness in British Columbia, Canada.
abstract: BACKGROUND
  In developed countries, gastrointestinal illness (GI) is typically mild and self-limiting, however, it has considerable economic impact due to high morbidity.
  
  
  METHODS
  The magnitude and distribution of acute GI in British Columbia (BC), Canada was evaluated via a cross-sectional telephone survey of 4,612 randomly selected residents, conducted from June 2002 to June 2003. Respondents were asked if they had experienced vomiting or diarrhoea in the 28 days prior to the interview.
  
  
  RESULTS
  A response rate of 44.3% was achieved. A monthly prevalence of 9.2% (95% CI 8.4-10.0), an incidence rate of 1.3 (95% CI 1.1-1.4) episodes of acute GI per person-year, and an average probability that an individual developed illness in the year of 71.6% (95% CI 68.0-74.8), weighted by population size were observed. The average duration of illness was 3.7 days, translating into 19.2 million days annually of acute GI in BC.
  
  
  CONCLUSIONS
  The results corroborate those from previous Canadian and international studies, highlighting the substantial burden of acute GI.
authors.affiliation: Foodborne, Waterborne and Zoonotic Infections Division, Public Health Agency of Canada, Guelph and Ottawa, Ontario, Canada. Kate_Thomas@phac-aspc.gc.ca
authors.forename: M Kate
authors.initials: MK
authors.lastname: Thomas
authors.forename: Shannon E
authors.initials: SE
authors.lastname: Majowicz
authors.forename: Laura
authors.initials: L
authors.lastname: MacDougall
authors.forename: Paul N
authors.initials: PN
authors.lastname: Sockett
authors.forename: Suzie J
authors.initials: SJ
authors.lastname: Kovacs
authors.forename: Murray
authors.initials: M
authors.lastname: Fyfe
authors.forename: Victoria L
authors.initials: VL
authors.lastname: Edge
authors.forename: Kathryn
authors.initials: K
authors.lastname: Doré
authors.forename: James A
authors.initials: JA
authors.lastname: Flint
authors.forename: Spencer
authors.initials: S
authors.lastname: Henson
authors.forename: Andria Q
authors.initials: AQ
authors.lastname: Jones
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001955:British Columbia / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D016001:Confidence Intervals; D003430:Cross-Sectional Studies; D003967:Diarrhea / Q000209:etiology; D005260:Female; D005759:Gastroenteritis / Q000150:complications / Q000191:economics / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires; D014839:Vomiting / Q000209:etiology