Table 3. Odds ratio (OR) with 95% confidence interval (95% CI) and significance level (P-value) for maternal exposure to benzene and toluene in relation to preterm labor and delivery, for benzene and toluene exposure windows of 30, 60 and 90 days prior to delivery. São José dos Campos (SP), 2016*.
| Pollutant (µg/m3) | Window of exposure | OR | 95% CI | P-value |
|---|---|---|---|---|
| Benzene | 30 days | 1.06 | 0.95-1.17 | 0.30 |
| 60 days | 1.03 | 0.92-1.14 | 0.61 | |
| 90 days | 1.02 | 0.92-1.13 | 0.93 | |
| Toluene | 30 days | 1.09 | 0.99-1.21 | 0.07 |
| 60 days | 1.01 | 0.91-1.21 | 0.81 | |
| 90 days | 0.99 | 0.89-1.10 | 0.93 |
*Adjusted for the number of prenatal consultations.