Table 1. Baseline demographics and disease characteristics for patients with inflammatory bowel disease.
| White (n=5223) | U.S. Born Asian (n=35) | Asian Immigrant (n=81) | p value | |
|---|---|---|---|---|
| Crohn's disease (%) | 64 | 40 | 51 | 0.001 |
| Mean age in years (SD) | 41 (15) | 35 (10) | 40 (13) | 0.004 |
| Mean age at diagnosis in years (SD) | 29 (14) | 25 (11) | 33 (12) | 0.056 |
| Female (%) | 52 | 49 | 48 | 0.705 |
| Mean disease duration in years (SD) | 12 (11) | 10 (7) | 7 (7) | <0.001 |
| Mean follow up in months (SD) | 23 (10) | 25 (10) | 24 (11) | 0.576 |
| Current smokers (%) | 21 | 0 | 0 | 0.099 |
| Remission* (%) | 58 | 62 | 67 | 0.238 |
| History of IBD surgery (%) | 40 | 16 | 25 | 0.001 |
| Location of Crohn's Disease (%) | 0.099 | |||
| Ileal | 26 | 25 | 13 | |
| Colonic | 19 | 42 | 25 | |
| Ileocolonic | 55 | 33 | 63 | |
| Upper GI disease | 5 | 8 | 8 | 0.765 |
| Behavior of Crohn's Disease (%) | 0.514 | |||
| Inflammatory | 48 | 58 | 55 | |
| Stricturing | 29 | 17 | 18 | |
| Penetrating | 24 | 25 | 28 | |
| Perianal phenotype (%) | 18 | 33 | 33 | 0.027 |
| Perianal procedure (%) | 17 | 9 | 20 | 0.373 |
| Extent of Ulcerative Colitis (%) | 0.954 | |||
| Proctitis | 13 | 10 | 13 | |
| Left sided colitis | 30 | 29 | 34 | |
| Extensive/Pancolitis | 58 | 62 | 53 |
*
Remission is defined as a modified Harvey-Bradshaw Index (HBI) score <5 or Simple Clinical Colitis Activity Index (SCCAI) score ≤ 2