Adjusted odds ratios for the relationships between different numbers of courses of antibiotics and Crohn’s disease in subjects with no symptoms or gastrointestinal drugs
| No of courses of antibiotics | No exposed | OR | 95% CI | |
|---|---|---|---|---|
| Cases (n = 252) | Controls (n = 1022) | |||
| OR, odds ratio; 95% CI, 95% confidence interval. | ||||
| 1 | 62 | 192 | 1.57 | 1.07–2.29 |
| 2–5 | 81 | 258 | 1.50 | 1.05–2.14 |
| Over 5 | 20 | 50 | 1.51 | 0.82–2.78 |