Worldwide incidence rates of Crohn’s disease (CD) and ulcerative colitis (UC)
| Mean annual incidence rate (/105) | Year | CD | UC |
|---|---|---|---|
| NA, not assessed | |||
| *Excluding ulcerative proctitis. | |||
| Spain6 | 1981–88 | 1.6 | 3.2 |
| France (Brittany)27 | 1994–95 | 2.8 | 2.9 |
| Italy (Florence)5 | 1978–92 | 2.8 | 7.7 |
| Southern Europe2 (>15 y old) | 1991–93 | 3.9 | 8.7 |
| Germany (Ruhr)16,18 | 1991–95 | 4.5 | 3.0* |
| Belgium (Liège)29 | 1993–96 | 4.5 | 3.6 |
| Denmark (Copenhagen)23 | 1981–92 | 4.6 | 13.2 |
| Iceland14 | 1990–94 | 5.5 | 16.5 |
| France (Puy de Dome)28 | 1993–94 | 5.7 | 1.9 |
| Norway12,24 | 1990–93 | 5.8 | 13.6 |
| Wales (Cardiff)11 | 1986–90 | 5.9 | NA |
| France (North) (present study) | 1988–99 | 6.0 | 4.0 |
| Sweden (Uppsala)19 | 1965–83 | 6.1 | 10.4 |
| USA (Minnesota)22 | 1984–93 | 6.9 | NA |
| The Netherlands (South Limbourg)21 | 1991–94 | 6.9 | 10.0 |
| Northern Europe2 (>15 y old) | 1991–93 | 7.0 | 11.8 |
| Canada (Manitoba)31 | 1989–94 | 14.6 | 14.3 |