Adjusted odds ratios (and 95% CI) for traffic exposure before age of 3, according to positivity of the skin prick tests*
| Positive tests | Negative tests | |
|---|---|---|
| *The model is adjusted for the same covariates as in table 2. | ||
| Tertile 1 | 1 | 1 |
| Tertile 2 | 0.61 (0.1 to 3.6) | 1.23 (0.29 to 5.31) |
| Tertile 3 | 11.03 (1.3 to 100.9) | 1.47 (0.32 to 6.97) |