Adjusted odds ratios (and 95% confidence intervals) for childhood asthma according to the exposure index, lifelong average, and before age of 3*
| Variables | Life long | Before age of 3 |
|---|---|---|
| (n = 390) | (n = 364) | |
| *The models also included the following variables: parental social category (three classes); ETS during pregnancy (yes/no); number of months of exposure to maternal smoking at home (four classes); day care attendance (yes/no); number of months of usage of gas for cooking (three classes); number of months with pets at home (three classes); number of months with traces of humidity at home (three classes). | ||
| †Life long: tertile 2 = (10.9 to 29.6); tertile 3⩾30.3 (vehicle/day)/m. | ||
| ‡Before age of 3: tertile 2 = (11.2 to 28.8); tertile 3⩾30.0 (vehicle/day)/m. | ||
| Personal allergy (yes/no) | 2.43 (1.44 to 4.10) | 2.73 (1.56 to 4.80) |
| Parental allergy (yes/no) | 1.71 (0.99 to 2.96) | 1.70 (0.93 to 3.07) |
| Exposure to traffic effluents†‡ | ||
| Tertile 1 | 1.00 | 1.00 |
| Tertile 2 | 0.95 (0.50 to 1.82) | 1.48 (0.73 to 3.02) |
| Tertile 3 | 0.82 (0.43 to 1.59) | 2.28 (1.14 to 4.56) |