Patients’ clinical characteristics
| Ulcerative colitis | Crohn's disease | Total | |
|---|---|---|---|
| Number of patients | 546 | 357 | 903 |
| Gender | |||
| Male | 269 (49.3%) | 253 (70.9%) | 522 (57.8%) |
| Female | 277 (50.7%) | 104 (29.1%) | 381 (42.2%) |
| Age (years) | 45.3±16.6 | 37.1±12.5 | 42.0±15.6 |
| Disease duration (years) | 9.7±9.0 | 11.6±8.1 | 10.5±8.7 |
| Disease extent | |||
| Total colitis | 208 (38.1%) | – | |
| Left-sided colitis | 183 (33.5%) | – | |
| Proctitis | 83 (15.2%) | – | |
| Unknown | 72 (13.2%) | – | |
| Disease location | |||
| Small intestine | – | 61 (17.1%) | |
| Colon | – | 212 (59.4%) | |
| Small intestine and colon | – | 47 (13.2%) | |
| Unknown | – | 37 (10.3%) | |
| Extra-intestinal complications | |||
| Positive | 51 (9.3%) | 43 (12.0%) | 94 (10.4%) |
| None | 495 (90.7%) | 314 (88.0%) | 809 (89.6%) |
| Smoking status | |||
| Current smokers | 55 (10.1%) | 85 (23.8%) | 140 (15.5%) |
| Past smokers | 162 (29.7%) | 74 (20.7%) | 236 (26.1%) |
| None | 327 (59.9%) | 198 (55.5%) | 525 (58.2%) |
| Unclear | 2 (0.3%) | 0 (0.0%) | 2 (0.2%) |
| Pregnancy experience | |||
| Positive | 181/277 | 41/104 | 222/381 |
| (During the earthquake) | (5) | (3) | (8) |