Skip to main content

Table 3 Adjusted odds ratios and 95%CIs of preterm birth and early term birth for each 10Ā Āµg/m3 increment in PM2.5 exposure during trimesters and the entire pregnancy

From: Associations of maternal exposure to fine particulateĀ matter with preterm and early-term birth in high-risk pregnant women

Ā 

High-level PM2.5

Low-level PM2.5

Ā 

Full term birth

Preterm birth

Early term birth

Full term birth

Preterm birth

Early term birth

Ā 

OR (95% CI)

P

OR (95% CI)

P

OR (95% CI)

P

OR (95% CI)

P

Trimester 1

1.00

0.91(0.80,1.04)

0.161

0.97(0.89,1.05)

0.444

1.00

0.95(0.82,1.10)

0.503

0.95(0.87,1.03)

0.210

Trimester 2

1.00

0.89(0.77,1.03)

0.122

0.99(0.90,1.07)

0.741

1.00

0.86(0.74,1.01)

0.071

1.02(0.93,1.12)

0.705

Trimester 3

1.00

1.35(1.16,1.58)

<ā€‰0.001

1.12(1.02,1.22)

0.021

1.00

0.93(0.81,1.06)

0.249

0.97(0.89,1.05)

0.431

Entire pregnancy

1.00

6.12(4.27,8.89)

<ā€‰0.001

1.96(1.59,2.43)

<ā€‰0.001

1.00

1.01(0.79,1.30)

0.917

0.99(0.85,1.14)

0.850

  1. High-level PM2.5: average concentration over the specified time periodā€‰ā‰„ā€‰75Ā Āµg/m3
  2. Low-level PM2.5: average concentration over the specified time periodā€‰<ā€‰75Ā Āµg/m3
  3. Logistic regression model, adjusted for maternal age, BMI, exposure to hazardous poison, number of previous deliveries, the season of conception, the year of conception, sex of the baby, mode of delivery, hyperglycemia, hypertension, scarred uterus, uterine fibroids, ovarian cyst, in vitro fertilization and the PM2.5 exposure level during earlier stages of pregnancy
Back to article page

Genes and Environment

ISSN: 1880-7062

Contact us