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. Author manuscript; available in PMC: 2018 May 29.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2016 Dec 14;27(3):313–319. doi: 10.1038/jes.2016.74

Table 1.

Characteristics of study population.

Variable Overall samples
(N = 35)
Paired samplesa
(N = 20)
Baby gender, n(%)
  Male 18 (0.51) 10 (0.50)
  Female 17 (0.49) 10 (0.50)
Birth weight, g, mean ± SD
  Male 3049.44 ± 286.94 3172.00 ± 252.84
  Female 2657.06 ± 358.81 2652.00 ± 409.03
Birth length, cm, mean ± SD
  Male 46.78 ± 1.40 47.00 ± 1.56
  Female 45.71 ± 2.39 45.80 ± 3.01
Head circumference, cm, mean ± SD 33.13 ± 1.31 33.48 ± 1.12
Birth gestational age, month, mean ± SD 38 ± 1.86 38.05 ± 2.19
  N of gestational age <37 weeks 8 5
Mother's pregnancy weight, kg, mean ± SD 54.29 ± 7.23 56.6 ± 7.37
Mother's education level, n(%)
  Primary education or less 12 (0.34) 9 (0.45)
  Secondary education or higher 23 (0.66) 11 (0.55)
Mother's age at pregnancy, year, mean ± SD
  Male 22.72 ± 3.68 23.8 ± 3.65
  Female 22.35 ± 2.60 23.2 ± 2.39
a

A subset of 20 infants whose mothers’ peripheral serum samples were collected at the second trimester.