Association of ulcerative colitis (UC) with childhood factors. Univariate analysis
| UC | OR | 95% CI | |
|---|---|---|---|
| Values are expressed as odds ratios (OR) with 95% confidence interval (CI). | |||
| *Disease during pregnancy: risk of premature delivery (n = 6); hormonal treatment during pregnancy (n = 2); hypertension (n = 3); rubella vaccine (n = 2); and other (n = 4). | |||
| Familial history of IBD | 5 | 1.45–17.2 | |
| Pairs with exposed cases/non-exposed controls | 15 | ||
| Pairs with non-exposed cases/exposed controls | 3 | ||
| Concordant pairs | 42 | ||
| Disease during pregnancy* | 4.7 | 1.3–16.1 | |
| Pairs with exposed cases/non-exposed controls | 14 | ||
| Pairs with non-exposed cases/exposed controls | 3 | ||
| Concordant pairs | 43 | ||
| Sucrose supplemented milk | 2.25 | 1–5.2 | |
| Pairs with exposed cases/non-exposed controls | 18 | ||
| Pairs with non-exposed cases/exposed controls | 8 | ||
| Concordant pairs | 34 | ||
| Appendicectomy | 0.3 | 0.1–0.95 | |
| Pairs with exposed cases/non-exposed controls | 3 | ||
| Pairs with non-exposed cases/exposed controls | 11 | ||
| Concordant pairs | 46 | ||
| Smallpox vaccination | 10 | 1.3–208 | |
| Pairs with exposed cases/non-exposed controls | 10 | ||
| Pairs with non-exposed cases/exposed controls | 1 | ||
| Concordant pairs | 49 | ||
| Poliomyelitis vaccination | 7 | 1.1–151 | |
| Pairs with exposed cases/non-exposed controls | 7 | ||
| Pairs with non-exposed cases/exposed controls | 1 | ||
| Concordant pairs | 52 | ||
| Bedroom sharing | 3.4 | 1.5–7.9 | |
| Pairs with exposed cases/non-exposed controls | 24 | ||
| Pairs with non-exposed cases/exposed controls | 7 | ||
| Concordant pairs | 29 | ||