Table 3 The relationship between level of PCB 138, 153, 180, sum, and 118 in different quartiles and blood glucose status (divided into 2 groups considering HBA1c = 5.7% as cut-off), considering the first quartile as the reference group (unadjusted ORs)

PCB138 N (HbA1c ≥ 5.7%)

47 (19)

31 (18)

30 (21)

32 (19)

OR (CI)

1.0 (Ref)

2.04 (0.81–5.12)

3.44 (1.30–9.11)

2.15 (0.86–5.38)

P value

–

0.13

0.01^*

0.10

PCB153 N (HbA1c ≥ 5.7%)

34 (12)

36 (22)

35 (23)

35 (20)

OR (CI)

1.0 (Ref)

2.88 (1.09–7.61)

3.51 (1.30–9.46)

2.44 (0.93–6.45)

P value

–

0.03^*

0.01^*

0.07

PCB180 N (HbA1c ≥ 5.7%)

51 (23)

30 (18)

29 (14)

30 (22)

OR (CI)

1.0 (Ref)

1.83 (0.73–4.56)

1.14 (0.46–2.83)

3.35 (1.26–8.91)

P value

–

0.19

0.78

0.01^*

PCB sum^a N (HbA1c ≥ 5.7%)

36 (15)

34 (20)

35 (20)

35 (22)

OR (CI)

1.0 (Ref)

2 (0.77–5.18)

1.87 (0.73–4.79)

2.37 (0.91–6.15)

P value

–

0.15

0.19

0.07

PCB118 N (HbA1c ≥ 5.7%)

104 (57)

12 (6)

12 (7)

12 (7)

OR (CI)

1.0 (Ref)

0.82 (0.25–2.73)

1.15 (0.34–3.87)

1.15 (0.34–3.87)

P value

–

0.75

0.82

0.82