Table 2 Prevalence and adjusted odds ratios of impaired fasting glucose by tertile of serum γ-glutamyltransferase (GGT) and category of body mass index (BMI)

184/822

240/800

315/802

19.5%

28.0%

39.4%

reference

1.6(1.2-2.2)

2.8(2.1-3.8)

<0.001

reference

1.4(1.0-1.9)

2.3(1.7-3.1)

<0.001

Tertile 1 (0 ~ 14 U/L)

Tertile 2 (15 ~ 19 U/L)

Tertile 3 (20 ~ 48 U/L)

151/1273

226/1101

381/1278

10.9%

19.7%

28.8%

reference

1.9(1.4-2.5)

3.1(2.4-4.0)

<0.001

reference

1.8(1.3-2.3)

2.5(1.9-3.3)

<0.001

Categories of BMI

<23 kg/m ²

23-25 kg/m ²

>25 kg/m ²

215/977

217/655

307/792

18.8%

32.5%

38.4%

reference

2.0(1.6-2.6)

2.7(2.2-3.4)

<0.001

reference

1.9(1.5-2.4)

2.3(1.8-2.9)

<0.001

211/1570

194/938

353/1144

12.4%

20.6%

29.3%

reference

1.7(1.3-2.3)

2.8(2.2-3.6)

<0.001

reference

1.6(1.2-2.1)

2.4(1.8-3.1)

<0.001