Table 2.

Distribution (%) of Hemoglobin A1C Levels According to the 2-Hour Glucose Concentrations on the Oral Glucose Tolerance Test in the NHANES III Data Set

			Hemoglobin A1C, %
2-Hr Glucose (mg/dL)	Number of Subjects	% of U.S. Population*	≤ULN (≤6.1)	<1% Above ULN (6.2%–7.0%)	≥ULN 1 1% (≥7.1%)
<140	2,021	76.2	97.2	2.7	0.1
140–199	554	17.1	91.4	8.5	0.1
200–239	111	2.8	69.4	29.5	1.1
≥240	150	3.9	40.9	24.7	34.4

^*Based on the U.S. population after weighting the surveyed population, which oversampled minorities; NHANES III, Third National Health and Nutrition Examination Survey; ULN, upper limit of normal.