Demographic and clinical characteristics of 330 Crohn’s disease patients
| Total No | 330 |
| Sex (M/F) | 137/193 |
| Age at diagnosis (y) | |
| Mean | 28.1 |
| Median | 24.6 |
| Range | 3.0–82.2 |
| Interquartile range | 20.2; 31.9 |
| Follow up (y) | |
| Mean | 16.9 |
| Median | 14.3 |
| Range | 0.42–56.8 |
| Interquartile range | 8.5; 24.0 |
| Jewish (%) | 3 (0.9) |
| Family history of IBD in 1st or 2nd degree relative (%) | 118 (35.7) |
| Smoking habit (%) | |
| Never | 131 (39.7) |
| Ex | 112 (33.9) |
| Current | 87 (26.4) |
| Disease location (%) | |
| Ileal | 255 (77.3) |
| Colonic | 201 (60.9) |
| Perianal | 144 (43.6) |
| No perianal | 186 (56.4) |
| Disease behaviour (%) | |
| Stenotic disease | 237 (71.8) |
| Fistulating | 118 (35.8) |
| Severe inflammatory colonic disease | 65 (19.7) |
| Extraintestinal manifestations (%) | |
| Type 1 peripheral arthropathy | 45 (13.6) |
| Type 2 peripheral arthropathy | 15 (4.5) |
| Ankylosing spondylitis | 7 (2.1) |
| Erythema nodosum | 31 (9.4) |
| Pyoderma gangrenosum | 5 (1.5) |
| Uveitis | 16 (4.8) |
| Primary sclerosing cholangitis | 6 (1.8) |