Skip to main content

Table 3 Association between exposure to outdoor air pollutants during pregnancy with birth anthropometrics

From: The effect of exposure to traffic related air pollutants in pregnancy on birth anthropometry: a cohort study in a heavily polluted low-middle income country

 

Linear regression coefficients (95% confidence interval)

Birth weight (g) (n = 340)

Birth length (mm) (n = 340)

PM2.5

 Crude

−52.34 (−150.24; 45.57)

− 3.43 (− 7.93; 1.08))

 Model 1

− 36.84 (− 126.91; 53.23)

− 2.89 (− 7.22; 1.44)

 Model 2

− 54.44 (− 146.14; 37.27)

−3.45 (− 7.87; 0.97)

Soot

 Crude

−47.02 (− 116.78; 22.74)

− 3.60 (− 6;80; − 0.40)*

 Model 1

−46.75 (− 110.77; 17.69)

− 3.60 (− 6;67; − 0.54)*

 Model 2

−48.76 (− 113.15; 15.63)

−3.83 (− 6;91; − 0.75)*

NOx

 Crude

−5.16 (− 61.05; 50.74)

−2.18 (− 4.74; 0.39)

 Model 1

−6.86 (− 58.18; 44.45)

−2.24 (− 4.70; 0.21)

 Model 2

−17.20 (− 69.79; 35.39)

− 2.82 (− 5.33; − 0.30)*

NO2

 Crude

−4.28 (− 61.44; 52.87)

−1.35 (− 4.33; 1.63)

 Model 1

−6.45 (− 58.92; 46.03)

−1.48 (− 4.44; 1.47)

 Model 2

−17.20 (− 70.60; 36.02)

−1.91 (− 4.98; 1.17)

  1. All effect estimates correspond to interquartile increase of each air pollutant i.e. every 7.14 μg/m3 for PM2.5, 0.75 × 10− 5 per m for soot, 4.68 μg/m3 for NOx, and 3.74 μg/m3 for NO2
  2. Model 1: Adjusted for gestational age
  3. Model 2: Adjusted for gestational age, parity, SES, mother’s working status, mother’s age at pregnancy, delta BMI during pregnancy, infant’s sex, passive smoking exposure, pregnancy complication
  4. *p < 0.05