Characteristic | Number | Per cent |
Total number | 1600 | |
Sex (male/female) | 568/1032 | 35.5–64.5 |
Age at diagnosis | ||
<40 years | 1335 | 83.4 |
>40 years | 265 | 16.6 |
Disease localisation | ||
Ileal | 408 | 25.5 |
Colon | 489 | 30.6 |
Ileocolon | 703 | 43.9 |
Upper gastrointestinal tract* | 190 | 11.9 |
Disease behaviour | ||
Non-stricturing, non-penetrating | 637 | 39.8 |
Stricturing | 405 | 25.3 |
Penetrating | 558 | 34.9 |
Perianal disease | 433 | 27.1 |
Extra-intestinal manifestations | 355 | 22.2 |
Operation | 810 | 50.6 |
Family history of inflammatory bowel disease | 223 | 13.9 |
Mean follow-up (years) | 14.2 (SD 10.4) |
*Patients could be classified as having disease localisation in the upper gastrointestinal tract next to ileal, colonic or ileocolonic localisation.