Antibiotic prescriptions and OR of developing colorectal cancer
| Amount of prescriptions compared with none* | OR (95% CI lower limit–upper limit) | |
| Crude | Adjusted† | |
| >0 | 1.26 (1.10 to 1.45) | 1.25 (1.10 to 1.44) |
| 1–2 | 1.11 (0.95 to 1.31) | 1.12 (0.95 to 1.32) |
| 3–4 | 1.37 (1.07 to 1.75) | 1.36 (1.06 to 1.74) |
| 5–122 | 1.43 (1.12 to 1.82) | 1.40 (1.10 to 1.79) |
| 5–10 | 1.31 (1.01 to 1.71) | 1.30 (1.00 to 1.70) |
| 11–122 | 2.00 (1.27 to 3.41) | 1.92 (1.17 to 3.16) |
*Category (number of prescriptions): All (>0), low (1–2), intermediate (3–4), high (5–10), very high (11–122).
†Adjusted for presence of type 2 diabetes mellitus.