Skip to main content

Table 2 Correlation coefficients (r) between birth weight and gestational weight gain and the relating indicators

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

  Birth weight Body weight gain during pregnancy
  r p value r p value
252 Male newborns
 Gestational age 0.413 <0.001 0.145 0.021
 Maternal age −0.022 0.722 −0.278 < 0.001
 Body mass index before pregnancy 0.175 0.005 0.059 0.354
 Body weight gain during pregnancy 0.200 0.001 -  
 Fish/seafood intake 0.045 0.473 0.029 0.651
 Total PCBs in cord blooda,b −0.252 < 0.001 −0.334 < 0.001
 PCB-153 in cord blooda,b −0.247 < 0.001 −0.325 < 0.001
 Total mercury in cord bloodb −0.130 0.039 −0.007 0.917
 Lead in cord bloodb −0.025 0.698 0.037 0.560
237 Female newborns
 Gestational age 0.311 < 0.001 0.116 0.074
 Maternal age 0.081 0.212 −0.127 0.050
 Body mass index before pregnancy 0.176 0.006 −0.245 < 0.001
 Body weight gain during pregnancy 0.251 0.004 -  
 Fish/seafood intake 0.048 0.465 −0.010 0.874
 Total PCBs in cord blooda,b −0.170 0.009 −0.270 < 0.001
 PCB-153 in cord blooda,b −0.179 0.006 −0.264 < 0.001
 Total mercury in cord bloodb −0.023 0.720 0.039 0.555
 Lead in cord bloodb −0.030 0.642 0.126 0.053
Total newborns
 Gestational age 0.361 < 0.001 0.133 0.003
 Maternal age 0.029 0.519 −0.208 < 0.001
 Body mass index before pregnancy 0.171 < 0.001 −0.103 0.022
 Body weight gain during pregnancy 0.190 < 0.001 -  
 Fish/seafood intake 0.043 0.348 0.009 0.843
 Total PCBs in cord blooda,b −0.207 < 0.001 −0.307 < 0.001
 PCB-153 in cord blooda,b −0.209 < 0.001 −0.299 < 0.001
 Total mercury in cord bloodb −0.074 0.100 0.014 0.763
 Lead in cord bloodb −0.022 0.635 0.078 0.086
  1. aThese data were used following adjusting for the laboratory
  2. bAll biomarkers in cord blood and seafood intake were logarithmically transformed