Determining the rate and overlap of the criteria of fasting blood glucose, 2 hour blood glucose after oral glucose tolerance test and HbA1c in the diagnostic of prediabetes in people at risk in Vietnam

Determine the rate of prediabetes based on fasting blood glucose concentration (G0), blood glucose concentration 2 hours after oral glucose tolerance test (G2) and HbA1c value and evaluate the overlap when using criteria in diagnosing prediabetes in the study group.