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Table 3 Concentrations of PCB groupings (mean ± SD) by study sample characteristics (n = 578) 1

From: Prenatal polychlorinated biphenyl exposure is associated with decreased gestational length but not birth weight: archived samples from the Child Health and Development Studies pregnancy cohort

Sample Characteristics

PCBtotal

PCBmono

PCBdi

PCBtri

PCB1b

PCB2b

PCB3

Total sample

3.30 ± 1.53

0.81 ± 0.52

2.23 ± 1.05

0.27 ± 0.15

0.17 ± 0.09

0.82 ± 0.44

1.51 ± 0.66

Maternal race

       

 White§

3.21 ± 1.34

0.80 ± 0.46

2.15 ± 0.90

0.26 ± 0.14

0.16 ± 0.08

0.78 ± 0.37

1.47 ± 0.58

 Black

3.32 ± 1.79

0.74 ± 0.41

2.31 ± 1.35

0.30 ± 0.17

0.18 ± 0.11

0.89 ± 0.57

1.51 ± 0.82

 Other

4.02 ± 2.07*

1.06 ± 0.92*

2.64 ± 1.30*

0.27 ± 0.16

0.21 ± 0.11*

0.99 ± 0.53*

1.76 ± 0.81

Sex of infant

       

 Male§

3.26 ± 1.58

0.79 ± 0.58

2.21 ± 1.03

0.26 ± 0.17

0.16 ± 0.09

0.82 ± 0.42

1.49 ± 0.65

 Female

3.35 ± 1.49

0.83 ± 0.45*

2.24 ± 1.07

0.27 ± 0.13

0.17 ± 0.09

0.82 ± 0.45

1.52 ± 0.66

Maternal smoking status

       

 Never§

3.33 ± 1.57

0.82 ± 0.45

2.25 ± 1.13

0.27 ± 0.13

0.17 ± 0.09

0.84 ± 0.48

1.51 ± 0.70

 Current

3.28 ± 1.29

0.79 ± 0.48

2.22 ± 0.82

0.27 ± 0.13

0.16 ± 0.08

0.80 ± 0.33

1.53 ± 0.55

 Former

3.26 ± 1.85

0.83 ± 0.75

2.17 ± 1.17

0.27 ± 0.22

0.16 ± 0.10

0.80 ± 0.49

1.47 ± 0.74

Maternal occupation

       

 Employed

3.25 ± 1.43

0.79 ± 0.46

2.20 ± 0.96

0.26 ± 0.13

0.16 ± 0.09

0.81 ± 0.39

1.49 ± 0.62

 Housewife/Part-time§

3.32 ± 1.59

0.82 ± 0.55

2.23 ± 1.10

0.27 ± 0.16

0.17 ± 0.09

0.83 ± 0.47

1.51 ± 0.68

Maternal education†

       

 No HS diploma

3.16 ± 1.47

0.76 ± 0.40

2.14 ± 1.03

0.26 ± 0.16

0.17 ± 0.10

0.80 ± 0.42

1.43 ± 0.67

 HS diploma only§

3.10 ± 1.26

0.76 ± 0.37

2.10 ± 0.91

0.25 ± 0.13

0.15 ± 0.09

0.77 ± 0.37

1.42 ± 0.57

 HS + some college

3.34 ± 1.62

0.79 ± 0.45

2.28 ± 1.17

0.28 ± 0.17

0.17 ± 0.09

0.85 ± 0.50

1.54 ± 0.72

 College graduate

3.64 ± 1.77

0.96 ± 0.80*

2.39 ± 1.05*

0.29 ± 0.13

0.17 ± 0.08

0.88 ± 0.44

1.63 ± 0.66*

Maternal age categories

       

 15-24

3.03 ± 1.32

0.74 ± 0.38

2.07 ± 0.97

0.23 ± 0.12

0.14 ± 0.09

0.76 ± 0.42

1.39 ± 0.59

 25-29§

3.34 ± 1.56

0.79 ± 0.44

2.28 ± 1.09

0.27 ± 0.14

0.17 ± 0.09

0.84 ± 0.45

1.54 ± 0.70

 30-34

3.42 ± 1.65

0.84 ± 0.50

2.31 ± 1.18

0.27 ± 0.12

0.17 ± 0.08

0.86 ± 0.51

1.55 ± 0.72

 ≥35

3.48 ± 1.59

0.90 ± 0.75

2.26 ± 0.91*

0.32 ± 0.20

0.19 ± 0.10

0.82 ± 0.35

1.56 ± 0.60

Maternal BMI categories

       

 Underweight

3.17 ± 1.24

0.68 ± 0.32

2.21 ± 0.88

0.28 ± 0.15

0.17 ± 0.09

0.78 ± 0.34

1.54 ± 0.56

 Normal§

3.42 ± 1.62

0.84 ± 0.57

2.30 ± 1.10

0.28 ± 0.16

0.17 ± 0.09

0.85 ± 0.46

1.56 ± 0.69

 Over-weight

3.02 ± 1.35

0.73 ± 0.36

2.05 ± 0.99

0.24 ± 0.12

0.15 ± 0.08

0.76 ± 0.41

1.38 ± 0.62

 Obese

3.01 ± 1.42

0.85 ± 0.45

1.93 ± 0.91

0.23 ± 0.14

0.15 ± 0.09

0.72 ± 0.39

1.29 ± 0.59*

Parity

       

 0§

3.21 ± 1.49

0.76 ± 0.41

2.20 ± 1.06

0.25 ± 0.14

0.16 ± 0.09

0.81 ± 0.45

1.48 ± 0.65

 1

3.22 ± 1.58

0.83 ± 0.69

2.13 ± 0.96

0.25 ± 0.11

0.16 ± 0.07

0.77 ± 0.39

1.45 ± 0.61

 2

3.46 ± 1.33

0.83 ± 0.43

2.34 ± 0.89*

0.30 ± 0.13*

0.18 ± 0.09

0.86 ± 0.36

1.59 ± 0.58

 ≥3

3.36 ± 1.66

0.83 ± 0.47

2.26 ± 1.21

0.28 ± 0.19

0.17 ± 0.10

0.85 ± 0.51

1.52 ± 0.76

  1. 1Differences in PCB levels within categories of maternal covariates were evaluated using analysis of variance with Bonferroni corrections.
  2. †HS = high-school.
  3. §reference category.
  4. *p<0.05.
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Environmental Health

ISSN: 1476-069X