From: Maternal exposure to low-level air pollution and pregnancy outcomes: a population-based study
Pollutant | Low birth weight | Preterm birth | ||
---|---|---|---|---|
Single pollutant model | Multiple pollutant model† | Single pollutant model | Multiple pollutant model† | |
OR (95% CI) | OR (95% CI) | OR 95% CI | OR 95% CI | |
Formaldehyde(per 5 μg/m3 increase in concentration) | ||||
1st trimester | 2.20 (1.00–4.85) | 2.39 (1.07–5.32) | 1.13 (0.64–1.97) | 0.91 (0.49–1.68) |
2nd trimester | 1.48 (0.65–3.40) | 1.57 (0.68–3.64) | 0.46 (0.27–0.78) | 0.38 (0.21–0.67) |
3rd trimester | 1.29 (0.62–2.73) | 1.17 (0.52–2.65) | 1.01 (0.64–1.59) | 0.94 (0.57–1.53) |
NO2 (per 10 μg/m3 increase in concentration) | ||||
1st trimester | 0.91 (0.53–1.56) | 0.79 (0.45–1.39) | 1.67 (1.28–2.18) | 1.69 (1.28–2.23) |
2nd trimester | 0.93 (0.61–1.41) | 0.88 (0.57–1.36) | 1.13 (0.90–1.40) | 1.30 (1.03–1.64) |
3rd trimester | 1.34 (0.94–1.92) | 1.32 (0.92–1.91) | 1.19 (0.96–1.47) | 1.19 (0.96–1.49) |