Table 1.
Demographics and Disease Characteristics of the Study Cohort
| Characteristics | No. | Category | Value |
|---|---|---|---|
| Age (yr) at diagnosis | 355 | 37.6±15.2 | |
| Sex | 355 | Male/female | 210 (59.2)/145 (40.8) |
| Body mass index (kg/m2) | 344 | 22.4±3.2 | |
| Smoking | 342 | Never or former | 312 (91.2) |
| Current | 30 (8.8) | ||
| Alcohol | 345 | Never or past | 191 (55.3) |
| Current | 154(44.6) | ||
| Currently employed | 348 | Yes/no | 169 (48.6)/179 (51.4) |
| Family income* | 309 | Low (<200) | 83 (26.9) |
| Middle (≥200 and <400) | 139 (45.0) | ||
| High (≥400) | 87 (28.2) | ||
| Family history of IBD | 334 | UC/CD/others | 12 (3.6)/1 (0.3)/3 (0.9) |
| Symptoms duration† | 354 | 15.9±36.1 | |
| <4 wk | 142 (40.1) | ||
| ≥4 wk | 212 (59.9) | ||
| Total Mayo score | 355 | 8.1±1.6 | |
| Disease severity‡ | 355 | Moderate/severe | 330 (93.0)/25 (7.0) |
| Endoscopic severity§ | 355 | Moderate/severe | 255 (71.8)/100 (28.2) |
| Disease extentII | 349 | Proctitis | 35 (10.0) |
| Left-sided colitis | 162 (46.4) | ||
| Extensive colitis | 152 (43.6) | ||
| ESR, mm/hr | 304 | 20.8±19.3 | |
| C-reactive protein, mg/dL | 324 | 2.6±7.3 | |
| White cell count, 103/μL | 346 | 12.7±60.2 | |
| Hemoglobin, g/dL | 347 | 12.8±2.0 | |
| Albumin, g/dL | 304 | 4.0±0.6 |
Data are presented as the mean±SD or number (%).
IBD, inflammatory bowel disease; UC, ulcerative colitis; CD, Crohn’s disease; ESR, erythrocyte sedimentation rate.
*
10,000 Korean Won; †Time between the first development of disease-related symptoms and UC diagnosis; ‡Moderate: total Mayo score 6–10; severe: total Mayo score ≥11; §Moderate: Mayo endoscopic subscore=2; severe: Mayo endoscopic subscore=3; IIMontreal classification.