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Table 2 Correlations of external exposure indices and internal PCB-values in all subjects

From: Neuropsychological effects of chronic low-dose exposure to polychlorinated biphenyls (PCBs): A cross-sectional study

  PCB 28 PCB 101 PCB 138 PCB 153 PCB 180 Total PCB
Age1 0.17 0.17 0.27* 0.27* 0.26* 0.28*
BMI1 0.39** 0.26*     
Hours of work/week1 0.63*** 0.51*** 0.19   0.21 0.25x
PCB years of exposure1 0.71*** 0.54*** 0.37** 0.32* 0.39** 0.43***
Weighted total exposure index1 0.71*** 0.59*** 0.39** 0.33** 0.40** 0.45***
Alcohol/week1   0.31* 0.27* 0.24x   0.22x
Cigarettes/day1     -0.20 -0.26* -0.17
Alternative vocational sources2     0.28*   0.18
Leather clothing2 0.24   0.24   0.33* 0.33*
Consumption of fish2 0.42*** 0.27*     
Consumption of poultry2      0.19  
  1. Note. *: p < 0.05, **: p < 0.01, ***: p < 0.001 nominal α; only correlations with at least a small effect size are given; correlations with potential exposure sources such as indoor installations of chemically treated wood, frequent meat or milk consumption were trivial and are not presented; correlations with large effect sizes are printed in bold.
  2. 1 Spearman rank correlations
  3. 2 Cramer-V.