Anthropometric and metabolic characteristics of the study subjects stratified according to the glucose tolerance.

Data are means ± SD. Comparisons between the three groups were performed using a general linear model with post hoc Bonferroni correction for multiple comparisons. P values refer to results after analyses with adjustment for age, gender, and BMI.*P values refer to results after analyses with adjustment for gender.**P values refer to results after analyses with adjustment for age and gender. Categorical variables were compared by χ2 test.