Table 4

Crude incidence and prevalence (per 100 000 population) of paediatric IBD by age group and sex for Ontario in 2005

SexAge groupTotal IBD incidenceTotal IBD prevalenceCD incidence*CD prevalence*UC incidence†UC prevalence†
F6 months–4 years0.63.30.3–0.40.9–1.10–0.21.8–2.2
5–9 years4.518.52.98.7–10.51.67.1–8.0
10–14 years16.064.57.1–8.932.1–37.46.1–7.024.5–27.2
15–17 years26.3146.713.5–15.278.7–85.210.3–11.158.2–61.4
Total10.951.75.5–6.326.4–29.74.1–4.620.2–22.0
M6 months–4 years2.96.70.3–0.41.5–1.72.3–2.54.4–5.0
5–9 years8.724.84.9–5.212.3–13.33.3–3.511.0–11.5
10–14 years16.884.010.7–11.854.2–59.04.4–5.022.6–25.1
15–17 years24.6170.712.9–14.1103.8–113.79.7–10.452.1–57.0
Total12.664.77.0–7.738.9–42.54.6–5.020.4–22.3
Both sexes6 months–4 years1.85.10.3–0.41.2–1.41.2–1.43.1–3.6
5–9 years6.621.73.9–4.110.5–11.92.5–2.69.1–9.8
10–14 years16.474.59.0–10.443.4–48.55.3–6.023.6–26.1
15–17 years25.4159.013.2–14.691.6–99.810.0–10.755.1–59.2
Both sexesAll age groups11.858.36.2–7.032.8–36.24.4–4.820.3–22.1

  • *The lower number in the range represents incident/prevalent cases of CD excluding unclassifiable patients. The upper range of incidence/prevalence represents the incidence/prevalence of CD including two-thirds of unclassifiable patients (except in the 6 month–4 years age group, where one-third of unclassifiable patients are included as possible CD cases).

  • †The lower number in the range represents incident/prevalent cases of UC excluding unclassifiable patients. The upper range of incidence/prevalence represents the incidenc/prevalence of UC including one-third of unclassifiable patients (except in the 6 months–4 years age group, where two-thirds of unclassifiable patients are included as possible UC cases).

  • CD, Crohn’s disease; F, female; IBD, irritable bowel syndrome; M, male; UC, ulcerative colitis.