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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Environ Int. 2019 Nov 21;134:105325. doi: 10.1016/j.envint.2019.105325

Table 3.

Relative risksa of PPD (EPDS ≥ 13) onset subtypes at 6 months postpartum for 5-μg/m3 change in PM2.5 exposure during pregnancy (N = 509).

6-month PPD subtype No. of cases RR (95% CI) P
Late postpartum onset (no PPD at 1 month + PPD at 6 months) 45 2.58 (1.40, 4.73) 0.002
Chronic postpartum (PPD at 1 and 6 months) 45 1.06 (0.63, 1.76) 0.83
a

Estimated from modified Poisson regression models with robust error variance, adjusted for maternal age at enrollment, tobacco exposure during pregnancy, maternal education, birth season, gestational age, and NLE score during pregnancy.