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Table 1 Comparison of study sample with the whole cohort

From: Genome-wide DNA methylation at birth in relation to in utero arsenic exposure and the associated health in later life

  Study sample (n = 64) All mothers and their newborn (n = 299)  
Variables Mean ± SD. or number(%) or Median(IQR) Mean ± SD. or number(%) or Median(IQR) p-value
Maternal Characteristics
Age (Years) 28.9 ± 4.8 28.3 ± 4.2 0.32
Pre-pregnant BMI (kg/m2) 20.5 ± 2.6 25.6 ± 3.9 1.92 × 10−23
Arsenic metabolites
μg g−1 creaa
   
Total arsenic 23.19(21.2) 22.26(28.51) 0.52
Inorganic arsenic 0.83(0.92) 0.79(1.11) 0.9
MMA 0.40(1.48) 0.46(1.85) 0.7
DMA 20.73(18.23) 20.01(24.82) 0.52
Maternal Education    5.12 × 10−15
 ≤high school 3 (4.7%) 132(44%)  
 high school +2 years 22(34.3%) 117(39%)  
 ≥high school +4 years 39(61%) 50(17%)  
Newborns
 Gestational Age (weeks) 39 ± 1.2 39 ± 2.8 1
  1. a: μg g−1 crea: μg per g creatinine