Characteristics of study cohorts, and incidence and relative risk of irritable bowel syndrome associated with gastroenteritis. Values are numbers (percentages) unless stated otherwise

VariableGeneral population (n=584 308)Gastroenteritis cohort (n=318)
Age (years)
25-39189 521 (32)80 (25)
40-59268 077 (46)150 (47)
60-74126 710 (22)88 (28)
Sex
Male304 187 (52)163 (51)
Female280 121 (48)155 (49)
Bacteria
Campylobacter172 (54)
Salmonella119 (37)
Other organisms27 (9)
One year follow up
Person years575 169303
No of cases of irritable bowel syndrome202712
Incidence/1000 person years (95% CI)3.5 (3.4 to 3.7)39.7 (22.5 to 69.9)
Relative risk (95% CI)*1.011.9 (6.7 to 21.0)
  • * Adjusted for age, sex, and body mass index.