Table 5 Association between cord blood concentrations of PFASs and risk for childhood AD in female children (n = 328)

 Continuous^a

328

74

1.05 (0.64–1.71)

1.10 (0.64–1.87)

 Q1 (< 1.80)^b

82

21

1

1

 Q2 (1.80–2.47)

82

16

0.70 (0.34–1.47)

0.73 (0.33–1.61)

 Q3 (2.47–3.22)

82

16

0.70 (0.34–1.47)

0.71 (0.32–1.60)

 Q4 (≥ 3.22)

82

21

1.00 (0.50–2.02)

1.08 (0.50–2.35)

 p for trend^c

0.85

0.74

 Continuous^a

328

74

2.05 (1.17–3.61)

2.07 (1.13–3.80)

 Q1 (< 4.94)^b

82

13

1

1

 Q2 (4.94–7.00)

82

14

1.09 (0.48–2.50)

1.23 (0.52–2.93)

 Q3 (7.00–9.42)

82

20

1.71 (0.79–3.73)

1.81 (0.79–4.14)

 Q4 (≥ 9.42)

82

27

2.61 (1.23–5.52)

2.52 (1.12–5.68)

 p for trend^c

0.004

0.01

 Continuous^a

328

74

1.92 (0.99–3.74)

2.22 (1.07–4.58)

 Q1 (< 0.50)^b

82

15

1

1

 Q2 (0.50–0.66)

82

15

1.00 (0.45–2.21)

1.10 (0.46–2.62)

 Q3 (0.66–0.85)

82

19

1.35 (0.63–2.88)

1.30 (0.57–2.97)

 Q4 (≥ 0.85)

82

25

1.96 (0.94–4.07)

2.14 (0.97–4.74)

 p for trend^c

0.04

0.05

 Continuous^a

328

74

1.14 (0.80–1.63)

1.25 (0.86–1.84)

 Q1 (< 0.25)^b

82

19

1

1

 Q2 (0.25–0.38)

82

17

0.87 (0.41–1.82)

1.01 (0.46–2.23)

 Q3 (0.38–0.53)

82

12

0.57 (0.26–1.26)

0.54 (0.22–1.30)

 Q4 (≥ 0.53)

82

26

1.54 (0.77–3.08)

2.14 (1.00–4.57)

 p for trend^c

0.35

0.13

 Continuous^a

328

74

1.15 (0.71–1.86)

1.24 (0.74–2.10)

 Q1 (< 0.29)^b

82

17

1

1

 Q2 (0.29–0.41)

82

17

1.00 (0.47–2.13)

1.11 (0.49–2.50)

 Q3 (0.41–0.54)

82

19

1.15 (0.55–2.42)

1.20 (0.55–2.64)

 Q4 (≥ 0.54)

82

21

1.32 (0.64–2.73)

1.55 (0.70–3.43)

 p for trend^c

0.41

0.28

 Continuous^a

328

74

0.88 (0.57–1.36)

0.91 (0.57–1.46)

 Q1 (≤ 0.069)^b

82

13

1

1

 Q2 (0.069–0.096)

82

27

2.61 (1.23–5.52)

3.24 (1.44–7.27)

 Q3 (0.096–0.128)

82

17

1.39 (0.63–3.08)

1.44 (0.62–3.36)

 Q4 (≥ 0.128)

82

17

1.39 (0.63–3.08)

1.63 (0.68–3.92)

 p for trend^c

0.91

0.74

 Continuous^a

328

74

1.59 (0.77–3.31)

1.43 (0.64–3.15)

 Q1 (≤ 0.13)^b

82

14

1

1

 Q2 (0.13–0.16)

82

16

1.18 (0.53–2.60)

1.43 (0.62–3.30)

 Q3 (0.16–0.20)

82

18

1.37 (0.63–2.97)

1.29 (0.55–2.99)

 Q4 (≥ 0.20)

82

26

2.26 (1.08–4.73)

2.30 (1.03–5.15)

 p for trend^c

0.03

0.06

 Continuous^a

328

74

1.22 (0.75–1.97)

1.23 (0.74–2.04)

 Q1 (≤ 0.037)^b

82

14

1

1

 Q2 (0.037–0.047)

81

18

1.39 (0.64–3.02)

1.65 (0.70–3.84)

 Q3 (0.047–0.061)

83

23

1.86 (0.88–3.94)

1.83 (0.81–4.17)

 Q4 (≥ 0.061)

82

19

1.46 (0.68–3.17)

1.50 (0.65–3.48)

 p for trend^c

0.25

0.35