Table 1

A1C and proportions of elevated levels (A1C >6%) by population characteristics in adults aged ≥20 years without diagnosed diabetes, U.S. 1999–2006

Unweighted nA1CA1C >6.0%
Overall15,9345.3 ± 0.013.8 ± 0.17
Age-group
    20–39 years6,3185.1 ± 0.101.0 ± 0.13
    40–59 years4,7895.4 ± 0.014.4 ± 0.33
    60–69 years2,0705.5 ± 0.039.1 ± 0.73
    ≥70 years2,7575.5 ± 0.028.3 ± 0.59
Sex
    Male7,5245.3 ± 0.014.3 ± 0.26
    Female8,4105.3 ± 0.013.4 ± 0.22
Race/ethnicity
    Non-Hispanic white8,3105.3 ± 0.013.2 ± 0.20
    Non-Hispanic black3,0385.4 ± 0.016.6 ± 0.45
    Mexican American3,4365.4 ± 0.013.9 ± 0.36
    Other9985.4 ± 0.036.0 ± 0.83
Hypertension
    No10,1445.2 ± 0.972.2 ± 0.16
    Yes5,7805.5 ± 0.017.3 ± 0.41
Hypercholesterolemia
    No10,3475.2 ± 0.952.9 ± 0.18
    Yes5,4945.4 ± 0.015.7 ± 0.35
Smoking
    Never smoker8,3005.3 ± 0.013.5 ± 0.23
    Former smoker4,0295.4 ± 0.025.1 ± 0.39
    Current smoker3,5835.3 ± 0.013.2 ± 0.32
BMI
    <25 kg/m25,1995.2 ± 0.011.1 ± 0.14
    25–<30 kg/m25,5785.3 ± 0.013.2 ± 0.26
    ≥30 kg/m24,7895.5 ± 0.017.8 ± 0.46
Education
    Post high school7,4035.3 ± 0.012.8 ± 0.21
    High school3,7995.3 ± 0.014.0 ± 0.35
    Less than high school4,7015.4 ± 0.016.7 ± 0.45
History of cardiovascular disease1,1685.5 ± 0.028.7 ± 0.91
Alcohol consumption
    Never4,5535.4 ± 0.015.8 ± 0.41
    Former1,4905.4 ± 0.026.2 ± 0.73
    Current8,7945.3 ± 0.012.7 ± 0.18
C-reactive protein quartiles
    0.01–<0.08 mg/dl3,4725.2 ± 0.011.1 ± 0.17
    0.08–<0.19 mg/dl3,3765.3 ± 0.012.7 ± 0.29
    0.19–<0.44 mg/dl4,0655.4 ± 0.014.4 ± 0.38
    0.44–29.6 mg/dl4,5275.5 ± 0.027.5 ± 0.47