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Table 4 Associations between exposure to PCBs and PBDEs and birth weight among female/male infants

From: Prenatal exposure to polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) may influence birth weight among infants in a Swedish cohort with background exposure: a cross-sectional study

  Female infants Male infants
  βa SEb p N βa SEb p N
Multivariate modelc
   di-ortho PCBsd 42 99 0.7 161 200 77 0.01* 185
   di-ortho PCBsd – restrictede 88 136 1.0 110 189 88 0.03* 144
   PBDE(4)f 32 70 0.7 161 −126 62 0.04* 185
   PBDE(4)f – restrictede −20 104 0.8 110 −162 73 0.03* 144
Multivariate model including gestational lengthg
   di-ortho PCBsd 149 123 0.2 110 141 77 0.07 144
   PBDE(4)f −47 93 0.6 110 −139 64 0.03* 144
  1. aRegression coefficient, i.e. change in birth weight per 1-unit increase in ln-transformed contaminant concentration in breast milk.
  2. bStandard error.
  3. cDi-ortho PCB and PBDE(4) were included in the same model. Other covariates included were age of the mother, pre-pregnancy BMI, weight gain during pregnancy, education, smoking and infant sex.
  4. dSum of PCB 138, PCB 153 and PCB 180.
  5. eMultivariate regression analysis restricted to individuals with data on gestational length.
  6. fSum of BDE-47, BDE-99, BDE-100 and BDE-153.
  7. gGestational length was added to the covariates in the multivariate model.
  8. *p≤0.05.