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Table 3 Associations between exposure to di- ortho PCBs and PBDEs and birth weight

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

  βa SEb p N
Unadjusted modelc
   di-ortho PCBsd −26 44 0.6 411
   di-ortho PCBsd - restrictede 2 48 1.0 346
   PBDE(4)f −49 40 0.2 362
   PBDE(4)f – restrictede −47 42 0.3 346
Multivariate modelg
   di-ortho PCBsd 137 61 0.02* 346
   di-ortho PCBsd - restrictedh 131 74 0.08 254
   PBDE(4)f −54 46 0.2 346
   PBDE(4)f – restrictedh −117 59 0.05* 254
Multivariate model including gestational lengthi
   di-ortho PCBsd 143 65 0.03* 254
   PBDE(4)f −106 52 0.04* 254
  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 separate models.
  4. dSum of PCB 138, PCB 153 and PCB 180.
  5. eRegression analysis restricted to individuals with data on all covariates included in the multivariate model.
  6. fSum of BDE-47, BDE-99, BDE-100 and BDE-153.
  7. gDi-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.
  8. hMultivariate regression analysis restricted to individuals with data on gestational length.
  9. iGestational length was added to the covariates in the multivariate model.
  10. *p≤0.05.