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Table 3 Relations of prenatal biomarkers and confounders to birth weight: results of multiple regression analysisa

From: Effects of intrauterine exposures to polychlorinated biphenyls, methylmercury, and lead on birth weight in Japanese male and female newborns

 

252 Male newborns

237 Female newborns

Total newborns

Standardized regression coefficient, β

p value

Standardized regression coefficient, β

p value

Standardized regression coefficient, β

p value

Total PCBs in cord blood

−0.171

0.004

−0.166

0.009

−0.161

< 0.001

Total mercury in cord blood

−0.120

0.042

−0.042

0.499

−0.078

0.061

Lead in cord blood

0.023

0.692

−0.039

0.513

−0.011

0.784

Possible confounders

 Gestational age

0.397

< 0.001

0.373

< 0.001

0.383

< 0.001

 Parity

0.075

0.201

0.102

0.116

0.093

0.030

 Body mass index before pregnancy

0.143

0.012

0.227

< 0.001

0.180

< 0.001

 Smoking during pregnancy

−0.066

0.237

0.080

0.185

0.006

0.889

 Drinking during pregnancy

0.001

0.986

0.019

0.756

0.010

0.812

 Fish/seafood intake

0.080

0.168

0.067

0.288

0.069

0.099

 Child sex

-

-

-

-

0.159

< 0.001

Contribution rate, R 2

0.229

< 0.001

0.204

< 0.001

0.239

< 0.001

  1. aTotal PCBs was used following adjusting for the laboratory, and all biomarkers in cord blood and fish/seafood intake were logarithmically transformed
  2. R indicates the multiple correlation coefficient