| Denmark (Aarhus and Copenhagen) |
57 053 |
Population‐based cohort of men and women aged 50–64 years. Recruited between 1993 and 1997. Cases identified from national databases of inflammatory bowel disease. |
11 (15.1%) |
| United Kingdom (Norfolk) |
25 639 |
Population‐based cohort of men and women aged 45–74 years. Recruited between 1993 and 1997. Cases identified from follow‐up questionnaires, in‐patient admission data and histopathology records. |
11 (15.1%) |
| Germany (Heidelberg) |
25 540 |
Population‐based cohort of men aged 45–65 years and women aged 35–65 years. Recruited between 1994 and 1998. Cases identified from follow‐up questionnaires. |
9 (12.3%) |
| Germany (Potsdam) |
27 548 |
Population‐based cohort of men and women, aged 35–64 years. Recruited between 1994 and 1998. Cases identified from follow‐up questionnaires. |
4 (5.5%) |
| The Netherlands (Amsterdam, Doetinchem, Maastricht and Utrecht) |
40 092 |
Men & women, aged 20–70 years recruited between 1993 and 1997 from the general population of three cities (Amsterdam, Doetinchem & Maastricht) and also the breast cancer screening programme in Utrecht. Cases identified from pathology registries. |
17 (23.3%) |
| Umeå (Sweden) |
25 732 |
Population‐based cohort of men and women aged 45–69 years. Recruited between 1991 and 1996. Cases identified from regional databases of inflammatory bowel disease. |
10 (13.7%) |
| Malmö (Sweden) |
28 098 |
Population‐based cohort of men and women aged 30–60 years. Recruited between 1992 and 1996. Cases identified from regional databases of inflammatory bowel disease. |
11 (15.1%) |
