Table 5.
Crude and adjusted ORs for SGA and road proximity.
| Measure | No. of SGA cases (% of total subjects) | Crude OR (95% CI) | Adjusteda OR (95% CI) |
|---|---|---|---|
| < 150 m highwayb or < 50 major roadc | 1,374 (1.96) | 1.04 (0.98–1.11) | 1.02 (0.96–1.08) |
| < 50 m highway | 176 (0.25) | 1.25 (1.07–1.47) | 1.21 (1.03–1.42) |
| 50–150 m highway | 404 (0.57) | 0.95 (0.86–1.06) | 0.92 (0.83–1.03) |
| < 50 m major road | 841 (1.20) | 1.06 (0.98–1.14) | 1.04 (0.97–1.13) |
| 50–150 m major road | 1,592 (2.27) | 1.05 (0.99–1.11) | 1.04 (0.98–1.10) |
a
Adjusted for infant sex, First Nations status, parity, maternal age, maternal smoking during pregnancy, month–year of birth, income (quintile-census), maternal education (quartile-census).
b
DMTI type 1 and 2 road (expressway: 114,000 vehicles/day; principal highway: 21,000 vehicles/day).
c
DMTI type 3 and 4 road (secondary highway: 18,000 vehicles/day; major road: 15,000 vehicles/day).