Demographic and disease characteristics of the study participants
| CD n=1315 | UC n=937 | p Value | |
|---|---|---|---|
| Male gender (%) | 490 (37.3) | 482 (51.4) | <0.01 |
| Age—years (±SD) | 47.8 (13.6) | 49.8 (13.3) | <0.01 |
| Smoking (%) | <0.01 | ||
| Current | 265 (20.2) | 77 (8.2) | |
| Never | 672 (51.1) | 542 (57.8) | |
| Ex-smoker | 378 (28.7) | 318 (33.9) | |
| Disease duration—median (IQR) | 16.2 (8.3–26.3) | 13.3 (6.6–21.5) | <0.01 |
| Disease localisation (%) | NA | ||
| Large bowel | 369 (28.1) | 937 (100) | |
| Small bowel | 260 (19.7) | NA | |
| Both small and large bowel | 647 (49.2) | NA | |
| Unknown | 39 (3.0) | NA | |
| Penetrating disease course (%) | 693 (52.7) | NA | NA |
| Disease in remission (%) | 1035 (78.7) | 699 (74.6) | 0.03 |
| Abdominal surgery in the past (%) | 717 (54.4) | 171 (18.2) | <0.01 |
| Stoma (%) | 159 (12.1) | 53 (5.7) | <0.01 |
| Low education (%) | 821 (62.4) | 543 (58.0) | <0.03 |
| Employment status (18–65 years) (%) | 1177 (89.5) | 816 (87.1) | <0.01 |
| Employed | 705 (53.6) | 573 (61.2) | |
| Fully work disabled | 206 (17.5) | 80 (9.8) | |
| Partial work disabled | 98 (8.3) | 40 (4.9) | |
| Retired | 52 (4.4) | 37 (4.5) | |
| Homemaker | 111 (9.4) | 62 (7.6) | |
| Student | 44 (3.7) | 12 (1.5) |
CD, Crohn's disease; UC, ulcerative colitis.