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Table 1 Distribution of variables and BPA and PFC concentrations by population characteristics

From: Social disparities in exposures to bisphenol A and polyfluoroalkyl chemicals: a cross-sectional study within NHANES 2003-2006

 

BPA (n = 4739)

PFCs (n = 3953)

 

n (%)

median (μg/ g creatinine)

n (%)

PFOA median (μg/L)

PFOS median (μg/L)

PFNA median (μg/L)

PFHxS median (μg/L)

Age

       

   6 to 11

640 (14)

3.3

     

   12 to 19

1331 (28)

2.0

1196 (30)

3.7

16.0

0.9

2.1

   20 to 59

1865 (39)

2.0

1795 (45)

3.7

17.0

1.0

1.6

   > = 60

903 (19)

1.9

962 (24)

4.0

23.5

1.0

1.9

Gender

       

   Female

2390 (50)

2.3

1998 (51)

3.2

15.0

0.8

1.5

   Male

2349 (50)

1.9

1955 (49)

4.3

21.2

1.1

2.1

NHANES cycle

       

   2003-2004

2314 (49)

2.6

1929 (49)

3.8

19.8

0.9

1.9

   2005-2006

2425 (51)

1.7

2024 (51)

3.7

16.0

1.0

1.7

Family income

       

   $0-$19,999

1360 (29)

2.4

1185 (30)

3.4

16.5

0.9

1.7

   $20,000-$44,999

1502 (32)

2.1

1326 (34)

3.7

17.9

0.9

1.8

   $45,000-$74,999

924 (19)

2.0

735 (19)

4.0

18.5

1.0

1.8

   $75,000 and over

953 (20)

1.9

707 (18)

4.2

19.8

1.1

2.0

Poverty income ratio

       

   PIR < 1

1104 (23)

2.4

869 (22)

3.2

14.4

0.8

1.7

   PIR 1-3

1983 (42)

2.2

1742 (44)

3.7

17.9

0.9

1.8

   PIR > 3

1652 (35)

1.8

1342 (34)

4.2

20.2

1.0

2.0

Adjusted family income a

       

   Quartile 1

1077 (23)

2.5

864 (22)

3.3

15.7

0.8

1.7

   Quartile 2

1156 (24)

2.2

1040 (26)

3.6

17.0

0.9

1.7

   Quartile 3

1142 (24)

2.1

938 (24)

3.8

18.4

0.9

0.2

   Quartile 4

1364 (29)

1.8

1111 (28)

4.2

20.6

1.1

2.0

Food security status

       

   Very low

294 (6)

2.6

216 (5)

3.7

17.6

0.9

1.8

   Low

564 (12)

2.3

458 (12)

3.3

14.5

0.9

1.6

   Marginal

416 (9)

2.3

350 (9)

3.4

16.3

0.9

1.7

   Full

3465 73)

2.0

2929 (74)

3.9

18.8

1.0

1.8

Emergency food

       

   Yes

362 (8)

2.4

291 (7)

3.4

15.0

0.8

1.7

   No

4377 (92)

2.1

3662 (93)

3.8

18.2

1.0

1.8

Education b

       

   Less than high school

753 (27)

1.9

780 (28)

3.4

18.3

0.9

1.7

   High school grad/GED

671 (24)

2.0

686 (25)

4.0

19.1

1.0

1.7

   Some college/AA degree

775 (28)

2.1

782 (28)

3.9

18.9

0.9

1.7

   College grad or above

566 (20)

1.8

508 (18)

4.1

21.0

1.1

1.8

Longest occupation b

       

   Never worked

142 (8)

2.4

142 (9)

3.5

17.4

0.7

2.1

   Blue collar, semi-routine

656 (39)

2.3

684 (42)

3.9

19.6

0.9

1.9

   Blue collar, high skill

226 (13)

2.5

212 (13)

3.6

22.0

0.9

1.7

   White collar, semi-routine

324 (19)

2.5

289 (18)

3.8

19.6

0.9

1.7

   White collar & professional

347 (20)

2.3

311 (19)

3.9

21.8

1.0

1.8

Race/Ethnicity

       

   Non-Hispanic White

1985 (42)

2.2

1781 (45)

4.2

19.9

1.0

1.9

   Non-Hispanic Black

1226 (26)

2.2

1013 (26)

3.7

19.5

1.0

1.9

   Mexican American US born

677 (14)

1.9

469 (12)

3.5

15.4

0.7

1.7

   Mexican American Foreign born

488 (10)

1.9

431 (11)

2.6

11.8

0.7

1.4

   Other Race/ Multiracial

222 (5)

2.1

142 (4)

3.6

18.6

1.0

2.0

   Other Hispanic

141 (3)

2.0

117 (3)

3.8

14.8

1.0

1.7

  1. a Quartiles of adjusted family income were calculated in the overall 2003-2006 population, so the numbers within the PFC and BPA subsets are unequal
  2. b Education includes only those over age 20 (BPA n = 2765, PFC n = 2756), and occupation only those over age 16 and in the 2003-2004 NHANES cycle (BPA n = 1695, PFC n = 1638)