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Table 1 Descriptive statistics for model parameters by occupation

From: Associations between polyfluoroalkyl substance and organophosphate flame retardant exposures and telomere length in a cohort of women firefighters and office workers in San Francisco

 

Full cohort

(N = 163)

Firefighters

(N = 84)

Office Workers

(N = 79)

  

Full cohort

Fire-

fighters

Office workers

 

Mean (SD) or GM (GSD)a

Mean (SD) or GM (GSD)a

Mean (SD) or GM (GSD)a

p-valueb

LODc

DFd(%)

DF(%)

DF(%)

Age (years)

 

47.93 (8.10)

47.38 (4.58)

48.52 (10.64)

0.23

–

–

–

–

Dairy consumption (times per week)

 

14.45 (8.19)

13.98 (7.30)

14.96 (9.07)

0.47

–

–

–

–

Egg consumption (times per week)

 

3.71 (1.93)

3.96 (2.00)

3.46 (1.84)

0.23

–

–

–

–

Telomere Length (mean TRF in kbpe)

 

7.90 (1.12)

8.10 (1.09)

7.68 (1.13)

0.01*

–

–

–

–

PFAS (ng/mL)

 PFHxS

3.68 (2.79)

4.55 (2.82)

2.94 (2.64)

0.01*

0.02

100

100

100

 PFOA

1.16 (1.76)

1.13 (1.70)

1.19 (1.83)

0.44

0.02

100

100

100

 PFOS

4.18 (2.08)

4.33 (1.83)

4.03 (2.35)

0.39

0.02

100

100

100

 PFNA

0.69 (1.94)

0.77 (1.98)

0.61 (1.87)

0.09

0.05

100

100

100

 PFDA

0.26 (2.09)

0.27 (1.77)

0.24 (2.42)

0.31

0.02

99

100

98

 PFUnDA

0.18 (4.44)

0.23 (3.67)

0.14 (5.19)

0.06

0.02

80

87

73

 PFBuS

0.13 (4.28)

0.13 (4.19)

0.13 (4.42)

0.85

0.02

73

74

72

OPFRs (ng/mL)

 BDCPP

1.92 (5.11)

4.05 (4.59)

0.87 (3.85)

≤0.01*

0.20

95

100

90

 BCEP

0.40 (6.11)

0.87 (5.72)

--f

--g

0.10

60

79

39

 DBuP

0.20 (3.92)

0.41 (3.95)

--f

--g

0.10

56

82

28

 TBBPA

--f

--f

--f

--g

0.20

44

46

41

 DpCP

--f

--f

--f

--g

0.10

29

42

16

  1. a Geometric mean (GM) and geometric standard deviation (GSD) computed for egg consumption, all PFAS, and all OPFRs due to skewed distributions
  2. b p-values derived from Wilcoxon rank-sum tests
  3. c LOD = limit of detection
  4. d DF = detection frequency
  5. e kilobase pairs
  6. f GMs were not calculated for chemicals with detection frequencies below 50%
  7. g Wilcoxon rank-sum tests were not performed for chemicals with detection frequencies below 50% in any group
  8. h All summary statistics calculated using LOD/sqrt [2] for those chemicals with less than 100% detection frequency