Table 3 Change in birth weight (in grams with 95% confidence intervals) associated with a 10 µg/m3 increase in PM10 and 1 standard deviation increase in biomass burning (bold results are statistically significant).

From: Exposure to ambient particulate matter and biomass burning during pregnancy: associations with birth weight in Thailand

Exposure

Model 1

Model 2

Model 3

PM10

  Trimester 1

−2.90 (−4.90 to −0.89)

−0.19 (−2.93 to 2.56)

−0.80 (−4.12 to 2.51)

  Trimester 2

−0.86 (−2.47 to 0.75)

2.21 (−0.65 to 5.08)

2.28 (−1.21 to 5.76)

  Trimester 3

0.56 (−1.57 to 2.69)

2.33 (−0.54 to 5.19)

0.69 (−2.78 to 4.16)

  Entire pregnancy

−3.51 (−7.09 to 0.07)

−2.39 (−6.94 to 2.16)

−6.81 (−12.52 to −1.10)

Biomass burning

  Trimester 1

−9.64 (−12.51 to −6.77)

−0.54 (−4.62 to 3.55)

−1.39 (−5.83 to 3.06)

  Trimester 2

−7.08 (−9.84 to −4.31)

0.77 (−3.29 to 4.83)

−1.71 (−6.32 to 2.91)

  Trimester 3

−6.01 (−8.88 to −3.15)

1.48 (−2.54 to 5.49)

−1.87 (−6.54 to 2.79)

  Entire pregnancy

−12.37 (−15.13 to −9.61)

−3.12 (−7.42 to 1.17)

−6.34 (−11.35 to −1.34)

  1. Model 1 = unadjusted.
  2. Model 2 = adjusted for sex, gravidity, maternal age, gestation age, year, province, heat index.
  3. Model 3 = model 2 + NO2.
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