Table 4.
Adjusted odds ratios and 95% CIs for autism spectrum disorder and exposure to air pollutants and heavy metals according to the stage of pregnancy in a four-pollutant model.
| With Autism Spectrum Disorder | ||
|---|---|---|
| SO2 + NO2 + Pb + Cd | OR (95%CI) | |
| SO2 | Total | 3.288 (2.306–4.687) |
| 1st stage | 1.770 (1.338–2.342) | |
| 2nd stage | 2.128 (1.557–2.909) | |
| 3rd stage | 2.723 (1.971–3.761) | |
| NO2 | Total | 1.322 (1.244–1.403) |
| 1st stage | 1.233 (1.165–1.304) | |
| 2nd stage | 1.421 (1.346–1.501) | |
| 3rd stage | 1.267 (1.197–1.341) | |
| Pb | Total | 1.079 (1.017–1.145) |
| 1st stage | 1.041 (0.993–1.092) | |
| 2nd stage | 0.980 (0.936–1.026) | |
| 3rd stage | 1.063 (1.019–1.110) | |
| Cd | Total | 0.441 (0.184–1.057) |
| 1st stage | 1.233 (1.165–1.304) | |
| 2nd stage | 1.421 (1.346–1.501) | |
| 3rd stage | 1.267 (1.197–1.341) | |
Logistic regression model was adjusted for maternal age, education, infant sex, season of conception, and household income.