2hPG (m mol/l) FPG (m mol/l) HbA1c (%)
  < 7.8 7.8-11.0 >11.0 <5.6 5.6-6.9 ³7.0 <5.7 5.7-6.4 ³6.5
2hPG (m mol/L) 5.7 ± 0.1 9.2 ± 0.1 15.6 ± 0.3 7.0 ± 0.1 8.1 ± 0.2 17.8 ± 0.5 6.9 ± 0.1 8.0 ± 0.1 17.9 ± 0.5
FPG (m mol/L) 5.3 ± 0.1 5.4 ± 0.1 7.6 ± 0.2 5.1 ± 0.1 6.0 ± 0.1 10.5 ± 0.2 5.3 ± 0.1 5.9 ± 0.1 10.0 ± 0.3
HbA1c (%) 5.3 ± 0.1 5.4 ± 0.1 6.7 ± 0.1 5.3 ± 0.1 5.5 ± 0.1 7.9 ± 0.2 5.1 ± 0.1 5.6 ± 0.1 8.2 ± 0.1
Age (yrs) 52.8 ± 0.3 56.4 ± 0.5a 60.0 ± 0.7 a 53.7 ± 0.3 56.5 ± 0.6 a 57.9 ± 0.9 a 53.3 ± 0.3 58.0 ± 0.4 a 58.2 ± 0.9 a
Ethnicity (%)                  
     White 81.2 80.9 77.8 81.3 79.6 76.0 a 84.8 70.0 a 67.8 a
     Black 9.1 7.9 8.7 8.7 8.2 11.6 a 6.0 16.0 a 16.5 a
     Hispanic 3.0 4.01 a 5.7 a 3.2 4.4 a 6.2 a 3.0 4.7 a 7.1 a
     Other 6.8 7.2 7.7 6.9 7.8 6.2 6.2 9.3 a 8.6
Body Mass Index (kg/m2) 26.9 ± 0.2 27.9 ± 0.2 a 29.0 ± 0.4 a 26.9 ± 0.2 28.3 ± 0.3 a 31.0 ± 0.5 a 26.9 ± 0.2 28.2 ± 0.3 a 30.8 ± 0.4 a
Education Level (%)                  
    Less than high
     school
23.4 27.6 a 37.4 a 23.7 31.7 a 39.1 a 22.3 35.0 a 42.6 a
High school or equivalent 32.6 39.4 a 35.1 34.7 34.1 32.8 34.6 34.3 33.7
College or above 44.0 33.1 a 27.4 a 41.6 34.2 a 28.1 a 43.1 30.8 a 23.6 a
a = p<0.05
Plus-minus values are means ± SD
Table 1: Characteristics of Participants in the Third National Health and Nutrition Examination Survey by categories of 2hPG, FPG and HbA1c.