Table 4. Association of the HGK methylation frequencies with OGTT glucose levels in three sub-populations (univariate linear regression analyses).

	All	Sub-population
	♂Waist = 91.8 ± 8.3 cm ♀Waist = 84.8 ± 10.0 cm n = 163 (130 men)	BMI ≤ 23 ♂Waist = 82.1 ± 6.3 cm ♀Waist = 74.5 ± 2.9 cm n = 38 (29 men)	23 < BMI ≤ 27 ♂Waist = 90.8 ± 4.5 cm ♀Waist = 82.7 ± 5.5 cm n = 72 (58 men)	27 < BMI ♂Waist = 99.8 ± 5.0 cm ♀Waist = 97.0 ± 6.7 cm n = 53 (43 men)
Pearson correlation coefficient	OGTT glucose levels
Pos. 1	0.562***	0.686***	0.512***	0.469*
Pos. 2	0.688***	0.801***	0.655***	0.652***
Pos. 3	0.600***	0.740***	0.553***	0.536***
Pos. 4	0.539***	0.695***	0.507***	0.448**
Pos. 5	0.564***	0.647***	0.522***	0.554***
Pos. 7	0.557***	0.658***	0.546***	0.485***
Pos. 8	0.595***	0.709***	0.546***	0.585***
Pos. 9	0.689***	0.792***	0.630***	0.709***
Pos. 10	0.513***	0.603***	0.531***	0.410**

The methylation frequencies from figure 2C and OGTT glucose levels from three sub-populations were analyzed using Pearson correlation/univariate linear regression. Pos., position. BMI, body mass index. Waist, waist circumference. *P value < 0.05; ** P value < 0.01; *** P value < 0.001.