Table 4.

Beta cell function (measured with HOMA Model [19] and prevalence of metabolic syndrome according to ATPIII criteria [20] in subjects discordant and concordant for the diagnosis of glucose tolerance with OGTT and HbA1c

	Normal by Both Criteria	Prediabetes by Both Criteria	Prediabetes OGTT only	Prediabetes HbA1c Only	P-Value
Number	100	150	146	50
FPG (mg/dl)	5.2 ± 0.03	6.0 ± 0.06	5.9 ± 0.04	5.3 ± 0.04	< 0.0001
2-h PG (mg/dl)	5.7 ± 0.1	8.0 ± 0.2	7.2 ± 0.2	5.9 ± 0.1	< 0.0001
HbA1c (%)	6.00 ± 0.02	5.31 ± 0.03	5.35 ± 0.02	5.91 ± 0.03	< 0.0001
Triglycerides (mM)	1.41 ± 0.08	1.72 ± 0.07	1.68 ± 0.09	1.62 ± 0.10	< 0.05
HDL (mM)	1.21 ± 0.03	1.08 ± 0.02	1.09 ± 0.02	1.05 ± 0.03	NS
HOMA-IR	3.0 + 0.3	4.1 + 0.4	3.1 ± 0.3	3.6 ± 0.3	< 0.05
Beta Cell Function	55 ± 1	33 ± 1	34 ± 1	51 ± 2	< 0.0001
Stern Score	8.3 ± 0.6	22.5 ± 1.4	16.1 ± 11	9.8 ± 0.9	< 0.0001
% MS	20	58	62	20	< 0.0001

FPG fasting plasma glucose, 2-h PG 2-h plasma glucose, MS metabolic syndrome