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Table 1 Summary of meta-analyses results related to preterm birth or infant low birth weight and PM2.5 exposure across pregnancy

From: Air pollution and children’s health—a review of adverse effects associated with prenatal exposure from fine to ultrafine particulate matter

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