Table 1 Patient characteristics.
| IBD patients (n = 1225) | Crohn's disease patients (n = 913) | Ulcerative colitis patients (n = 272) | ||||
|---|---|---|---|---|---|---|
| Women/men (%) | 686/539 (56/44) | 533/380 (58/42) | 134/138 (49/51) | |||
| Median age at diagnosis, years (IQR) | 24.0 (19.0–31.0) | 22.0 (18.0–30.0) | 27.0 (21.0–36.0) | |||
| Median age, years (IQR) | 36.0 (26.0–46.0) | 35.0 (26.0–46.0) | 35.0 (26.0–45.0) | |||
| Duration of disease, years (IQR) | 8.0 (3.0–14.0) | 8.5 (3.0–15.0) | 7.0 (2.0–13.0) | |||
| Familial (%) | 384/1220 (31) | 308/911 (34) | 68/269 (25) | |||
| IBD surgery (%) | 466/997 (47) | 422/755 (56) | 41/220 (19) | |||
| Smoking (%) | 366/891 (41) | 307/686 (45) | 57/189 (30) | |||
| Location | ||||||
| Ileal involvement (%) | 623/757 (82) | |||||
| Colonic involvement (%) | 558/757 (74) | |||||
| Upper involvement (%) | 74/757 (10) | |||||
| Anal involvement (%) | 287/751 (38) | |||||
| Proctitis (%) | 47/217 (22) | |||||
| Left‐sided colitis (%) | 81/217 (37) | |||||
| Pancolitis (%) | 89/217 (41) | |||||
| Behaviour* | ||||||
| Non‐stricturing non‐penetrating (%) | 274/738 (37) | |||||
| Stricturing (%) | 120/738 (16) | |||||
| Penetrating (%) | 344/738 (47) | |||||
IBD, inflammatory bowel disease; IQR, interquartile range.
*See Gasche et al.21