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Table 2 Descriptive statistics of measured naphthalene and metabolite concentrations in environmental and biological samples in the P4 Study

From: Urinary and breast milk biomarkers to assess exposure to naphthalene in pregnant women: an investigation of personal and indoor air sources

Sample

Pregnancy - weekday

Pregnancy - weekend

Weekday vs weekend day

2-3 months post-birth

Pregnancy vs. post-birth

 

N

Q1

Median

Q3

GM (GSD)

95th% ile

Min – Max

N

Q1

Median

Q3

GM (GSD)

95th% ile

Min – Max

Sign rank test

N

Q1

Median

Q3

GM (GSD)

95th% ile

Min – Max

Sign rank test

Air (μg/m 3 )

Personal

56

0.38

0.73

1.03

0.7 (2.18)

3.14

0.2 –6.37

58

0.37

0.79

1.21

0.79 (2.41)

3.9

0.2 - 14.85

0.10

61

1.09

1.74

2.46

1.68 (1.86)

4.51

0.3 - 12.31

<0.0001

Indoor

57

0.5

0.68

1.06

0.8 (2.01)

3.51

0.27 –5.97

58

0.45

0.73

1.05

0.76 (2.05)

3.56

0.22 -4.79

0.55

60

1.14

1.83

2.48

1.79 (1.82)

4.94

0.31 - 11.71

<0.0001

Urine (μg/L)

1-naphthol

62

0.73

1.14

2.28

1.32 (2.80)

6.06

0.13 - 126.08

67

0.67

1.05

1.91

1.16 (2.44)

3.85

0.23 - 81.57

 

62

0.65

1.06

1.62

1.04 (2.69)

6.16

0.14 - 11.62

 

1-naphthol – SG* corrected

62

0.7

1.19

2.22

1.34 (2.72)

6.3

0.2 - 140.7

67

0.78

1.15

1.74

1.23 (2.41)

3.68

0.22 -133.4

0.34

62

0.73

1.09

1.67

1.23 (2.08)

4.46

0.38 - 12.48

0.4

2-naphthol

62

1.7

2.73

5.09

2.92 (2.08)

9.57

0.81 -16.41

67

1.72

2.56

4.29

2.72 (2.14)

12.4

0.68 - 19.93

 

62

1.56

2.86

5.85

2.86 (2.86)

13.47

0.19 - 32.8

 

2-naphthol – SG* corrected

62

1.73

2.53

4.7

2.94 (1.99)

9.47

0.87 - 14.43

67

1.97

2.84

3.95

2.92 (1.93)

11.56

0.77 - 17.53

0.44

62

2.09

3.33

5.66

3.39 (2.16)

12.19

0.74 - 25.39

0.15

Breast Milk (ng/g lipid)

Naphthalene

              

N/A

52

6.06

7.55

13.05

9.12 (1.92)

40.17

3.86 – 79.36

N/A

  1. *Specific gravity.