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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 1.

Descriptive characteristics (N = 509).

Characteristics Level/Unit Median (IQR) or N (%)
Demographic
Maternal age at enrollment Years 27.4 (23.3, 31.7)
ETS exposure in pregnancya Yes 180 (35%)
Maternal education < High school 211 (41%)
High School 178 (35%)
> High School 120 (24%)
Birth season Dry/cold 188 (37%)
Dry/warm 103 (20%)
Rainy 218 (43%)
Gestational age Weeks 39 (38, 39)
NLEs during pregnancyb Score 3 (2, 5)
Air pollution
Average PM2.5 in pregnancy μg/m3 22.9 (20.6, 24.4)
Average PM2.5 in 1st year postpartum μg/m3 22.8 (20.8, 24.0)
Depression symptoms
EPDS during pregnancy, total Score 8 (4, 13)
EPDS at 1 month, total Score 6(2, 11)
EPDS at 6 months, total Score 5 (2, 10)
 Anhedonia subscale Score 0 (0, 2)
 Anxiety subscale Score 2 (1, 5)
 Depression subscale Score 1 (0, 4)
Probable depression, pregnancy EPDS ≥ 13 136 (27%)
Probable PPD, 1 month EPDS ≥ 13 93 (18%)
Probable PPD, 6 months EPDS ≥ 13 90 (18%)
a

Presence of at least one smoker in the household during pregnancy.

b

Sum of negative life events during pregnancy assessed by the CRISYS survey.