Table 1.
Clinical characteristics of patients with inflammatory bowel disease.
| Characteristics | Total IBD (N = 190) |
CD (n = 80) |
UC (n = 110) |
p value |
|---|---|---|---|---|
| Male sex, n (%) | 135 (71.1) | 60 (75.0) | 75 (68.2) | 0.306 |
| Mean age at diagnosis (years) (±SD) | 38.4 ± 15.9 | 36.0 ± 17.4 | 40.1 ± 14.6 | 0.080 |
| Cigarette smoking | 0.002 | |||
| Nonsmoking, n (%) | 132 (69.5) | 50 (62.5) | 82 (74.5) | |
| Ever smoking, n (%) | 32 (16.8) | 11 (13.8) | 21 (19.1) | |
| Current smoking, n (%) | 26 (13.7) | 19 (23.7) | 7 (6.4) | |
| Alcohol consumption | 0.194 | |||
| Nondrinking, n (%) | 156 (82.1) | 70 (87.5) | 86 (78.2) | |
| Ever drinking, n (%) | 10 (5.3) | 3 (3.8) | 7 (6.4) | |
| Current drinking, n (%) | 24 (12.6) | 7 (8.7) | 17 (15.4) | |
| Family history of IBD, n (%) | 8 (4.2) | 2 (2.5) | 6 (5.5) | 0.317 |
| Extraintestinal manifestations, n (%) | 15 (7.9) | 7 (8.8) | 8 (7.3) | 0.709 |
| Colorectal cancers, n (%) | 4 (2.1) | 1 (1.2) | 3 (2.7) | 0.484 |
| Fistula formation, n (%) | 22 (27.5) | |||
| Positivity of HBsAg^, n (%) | 21 (13.3) | 9 (11.3) | 12 (15.4) | 0.444 |
| Positivity of anti-HCV Ab^, n (%) | 0 (0) | 0 (0) | 0 (0) | |
| Positivity of p-ANCA∗, n (%) | 14 (22.2) | |||
| Positivity of c-ANCA∗, n (%) | 1 (1.6) |
Abbreviations: anti-HCV Ab: anti-hepatitis C virus antibody; c-ANCA: cytoplasmic anti-neutrophil cytoplasmic antibody; CD: Crohn's disease; HBsAg: hepatitis B surface antigen; IBD: inflammatory bowel disease; p-ANCA: perinuclear anti-neutrophil cytoplasmic antibody; UC: ulcerative colitis. ^There were 158 patients after excluding those with missing data. ∗There were 63 patients after excluding those with missing data.