| |
Adjusted odds ratio2
|
95 % confidence interval
|
|---|
|
Maternal age, years
| | |
|
<20
|
0.93
|
0.84, 1.02
|
|
20–24
|
0.99
|
0.94, 1.05
|
|
25–29
|
1.00
|
Referent
|
|
30–34
|
1.04
|
0.97, 1.10
|
|
35–39
|
1.27
|
1.19, 1.36
|
|
≥40
|
1.52
|
1.37, 1.69
|
|
Maternal race
| | |
|
Non-Hispanic white
|
1.00
|
Referent
|
|
Non-Hispanic black
|
1.46
|
1.36, 1.57
|
|
Hispanic
|
1.10
|
1.01, 1.18
|
|
Other Non-Hispanic
|
1.02
|
0.88, 1.18
|
|
Maternal education level
| | |
|
Less than high school
|
1.13
|
1.07, 1.19
|
|
High school only
|
1.23
|
1.17, 1.29
|
|
Postsecondary education
|
1.00
|
Referent
|
|
Prenatal care initiation
| | |
|
First trimester
|
1.00
|
Referent
|
|
Second trimester
|
0.97
|
0.94, 1.01
|
|
Third trimester
|
0.94
|
0.85, 1.05
|
|
No prenatal care
|
2.51
|
2.22, 2.84
|
|
Tobacco Use
|
1.28
|
1.22, 1.35
|
|
High PM2.5 exposure2
| | |
|
Average over pregnancy
|
1.19
|
1.09, 1.30
|
|
First trimester
|
1.02
|
0.97, 1.07
|
|
Second trimester
|
0.96
|
0.90, 1.01
|
|
Third trimester
|
1.28
|
1.20, 1.37
|
- 1. Odds ratio estimates for covariates are adjusted for other factors listed in the first column of the table as well as parity, infant sex, year of birth, season of birth, and insurance type in the model with high average PM2.5 exposure over pregnancy
- 2. The odds ratio estimates for first, second, third trimester high Pm2.5 exposure are from separate models with adjustment for the same covariates as listed above
