Table 1 Summary of meta-analyses results related to preterm birth or infant low birth weight and PM2.5 exposure across pregnancy
Reference | Odds ratio for preterm birth (95% CI) | Odds ratio for low birth weight (95% CI) | Effect estimate (g) for every10 μg/m3 increase in PM2.5 |
|---|---|---|---|
Stieb et al. [10] | 1.05 (0.98, 1.13) n = 4 | 1.05 (0.99, 1.12) n = 6 | −23.4 (−45.5, −1.4) n = 7 |
Zhu et al. [11] | 1.10 (1.03, 1.18) n = 8 | 1.05 (1.02, 1.07) n = 6 | −14.6 (−19.3, −9.9) n = 12 |
Lamichhane et al. [12] | 1.13 (0.98, 1.28) n = 5 | NA | −22.2 (−37.9, −6.4) n = 7 |
Sun et al. [13] | NA | 1.09 (1.03, 1.15) n = 19 | −15.9 (−26.8, −5.0) n = 17 |