Association of Crohn’s disease (CD) with childhood factors: univariate analysis
| CD | OR | 95% CI | |
|---|---|---|---|
| Results are expressed as odds ratios (OR) with 95% confidence interval (CI). | |||
| IBD, inflammatory bowel disease; MMR, measles-mumps-rubella; BCG, bacille Calmette Guerin. | |||
| Familial history of IBD | 4.6 | 2.6–8.3 | |
| Pairs with exposed cases/non-exposed controls | 65 | ||
| Pairs with non-exposed cases/exposed controls | 14 | ||
| Concordant pairs | 141 | ||
| Breast feeding | 1.6 | 1.1–2.4 | |
| Pairs with exposed cases/non-exposed controls | 66 | ||
| Pairs with non-exposed cases/exposed controls | 41 | ||
| Concordant pairs | 115 | ||
| Eczema | 2.9 | 1.5–5.6 | |
| Pairs with exposed cases/non-exposed controls | 35 | ||
| Pairs with non-exposed cases/exposed controls | 12 | ||
| Concordant pairs | 175 | ||
| MMR vaccination | 0.5 | 0.35–0.9 | |
| Pairs with exposed cases/non-exposed controls | 16 | ||
| Pairs with non-exposed cases/exposed controls | 32 | ||
| Concordant pairs | 184 | ||
| Smallpox vaccination | 2.1 | 1–4.3 | |
| Pairs with exposed cases/non-exposed controls | 23 | ||
| Pairs with non-exposed cases/exposed controls | 11 | ||
| Concordant pairs | 188 | ||
| BCG vaccination | 2.8 | 1.1–7.2 | |
| Pairs with exposed cases/non-exposed controls | 17 | ||
| Pairs with non-exposed cases/exposed controls | 6 | ||
| Concordant pairs | 199 | ||
| Poliomyelitis vaccination | 2.6 | 1.1–6.2 | |
| Pairs with exposed cases/non-exposed controls | 18 | ||
| Pairs with non-exposed cases/exposed controls | 7 | ||
| Concordant pairs | 197 | ||
| Tap water consumption | 0.5 | 0.3–0.8 | |
| Pairs with exposed cases/non-exposed controls | 25 | ||
| Pairs with non-exposed cases/exposed controls | 49 | ||
| Concordant pairs | 148 | ||
| Bedroom sharing | 1.6 | 1–2.4 | |
| Pairs with exposed cases/non-exposed controls | 58 | ||
| Pairs with non-exposed cases/exposed controls | 27 | ||
| Concordant pairs | 148 | ||