Table 2.
Prevalence and odds ratio of having family history of inflammatory bowel disease in China vs the United States
| China (n = 49) | United States (n = 145) | Unadjusted OR (95%CI) P value (Reference = US) | Adjusted1 OR (95% CI) P value (Reference = US) | |
| Any family history of IBD (%) | 4.1% (n = 2) | 39.3% | 0.07 (0.02-0.28) | 0.08 (0.02-0.34) |
| P = 0.0002 | P = 0.0008 | |||
| First-degree family history of IBD (%) | 4.1% (n = 2) | 23.5% | 0.14 (0.03-0.60) | 0.14 (0.03-0.65) |
| P = 0.008 | P = 0.01 |
1
Adjusted for the total number of siblings and children, and duration of disease at survey completion. IBD: Inflammatory bowel disease; OR: Odds ratio.