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Table 1—

Characteristics among individuals who have been told they have diabetes and who received an A1C measurement by NHANES wave

NHANES 1999–2000NHANES 2001–2002NHANES 2003–2004
n 403 448 482 
Age (years) 59.0 ± 0.8 57.4 ± 1.2 59.7 ± 0.8 
    18–44 (%) 15.6 ± 2.7 22.1 ± 3.4 13.2 ± 1.6 
    45–64 (%) 45.8 ± 3.3 44.2 ± 3.4 44.9 ± 2.9 
    65+ (%) 38.6 ± 2.1 33.8 ± 3.4 41.9 ± 3.3 
Sex (%)    
    Female 48.4 ± 3.7 49.7 ± 2.0 52.4 ± 1.4 
    Male 51.6 ± 3.7 50.3 ± 2.0 47.6 ± 1.4 
Race/ethnicity (%)    
    White non-Hispanic 61.2 ± 6.2 63.4 ± 3.9 70.8 ± 5.4 
    Black non-Hispanic 15.8 ± 3.8 14.4 ± 3.0 14.0 ± 2.9 
    Hispanic 17.0 ± 6.5 15.1 ± 4.5 11.3 ± 3.6 
    Other 5.9 ± 3.3 7.0 ± 2.4 3.8 ± 1.2 
Education (%)    
    <High school 43.2 ± 3.9 30.5 ± 2.7 29.8 ± 2.3 
    High school 25.7 ± 4.5 24.7 ± 2.2 24.3 ± 2.2 
    >High school 31.1 ± 4.7 44.8 ± 3.2 45.9 ± 2.7 
BMI (kg/m232.3 ± 0.6 31.5 ± 0.5 32.2 ± 0.7 
    <30 (%) 45.8 ± 4.4 48.7 ± 4.1 42.8 ± 4.0 
    ≥30 (%) 54.2 ± 4.4 51.3 ± 4.1 57.2 ± 4.0 
Income (%)    
    <$20,000 36.3 ± 4.1 28.8 ± 3.4 28.7 ± 2.8 
    $20,000+ 63.7 ± 4.1 71.2 ± 3.4 71.3 ± 2.8 
Insurance (%) 87.0 ± 2.9 91.3 ± 1.8 89.7 ± 1.5 
Duration (%)    
    <5 years 34.3 ± 3.6 37.5 ± 3.1 33.7 ± 2.8 
    5–14 years 33.1 ± 3.0 35.0 ± 3.0 39.1 ± 2.5 
    15+ years 32.6 ± 3.0 27.3 ± 2.4 27.0 ± 2.8 
Smoker (%)    
    Current 16.4 ± 2.6 22.6 ± 2.0 20.4 ± 2.4 
    Former 33.2 ± 3.7 31.4 ± 2.1 34.6 ± 2.4 
    Never 50.5 ± 4.9 46.0 ± 2.4 45.0 ± 2.9 
Diabetes treatment (%)    
    Diabetes pills only 53.2 ± 3.6 56.6 ± 2.4 58.9 ± 3.6 
    Insulin only 16.2 ± 2.2 16.4 ± 3.5 13.6 ± 2.0 
    Pills and insulin 10.7 ± 3.5 9.5 ± 1.8 9.2 ± 1.9 
    Diet only 19.9 ± 3.7 17.5 ± 2.7 18.3 ± 2.8 
NHANES 1999–2000NHANES 2001–2002NHANES 2003–2004
n 403 448 482 
Age (years) 59.0 ± 0.8 57.4 ± 1.2 59.7 ± 0.8 
    18–44 (%) 15.6 ± 2.7 22.1 ± 3.4 13.2 ± 1.6 
    45–64 (%) 45.8 ± 3.3 44.2 ± 3.4 44.9 ± 2.9 
    65+ (%) 38.6 ± 2.1 33.8 ± 3.4 41.9 ± 3.3 
Sex (%)    
    Female 48.4 ± 3.7 49.7 ± 2.0 52.4 ± 1.4 
    Male 51.6 ± 3.7 50.3 ± 2.0 47.6 ± 1.4 
Race/ethnicity (%)    
    White non-Hispanic 61.2 ± 6.2 63.4 ± 3.9 70.8 ± 5.4 
    Black non-Hispanic 15.8 ± 3.8 14.4 ± 3.0 14.0 ± 2.9 
    Hispanic 17.0 ± 6.5 15.1 ± 4.5 11.3 ± 3.6 
    Other 5.9 ± 3.3 7.0 ± 2.4 3.8 ± 1.2 
Education (%)    
    <High school 43.2 ± 3.9 30.5 ± 2.7 29.8 ± 2.3 
    High school 25.7 ± 4.5 24.7 ± 2.2 24.3 ± 2.2 
    >High school 31.1 ± 4.7 44.8 ± 3.2 45.9 ± 2.7 
BMI (kg/m232.3 ± 0.6 31.5 ± 0.5 32.2 ± 0.7 
    <30 (%) 45.8 ± 4.4 48.7 ± 4.1 42.8 ± 4.0 
    ≥30 (%) 54.2 ± 4.4 51.3 ± 4.1 57.2 ± 4.0 
Income (%)    
    <$20,000 36.3 ± 4.1 28.8 ± 3.4 28.7 ± 2.8 
    $20,000+ 63.7 ± 4.1 71.2 ± 3.4 71.3 ± 2.8 
Insurance (%) 87.0 ± 2.9 91.3 ± 1.8 89.7 ± 1.5 
Duration (%)    
    <5 years 34.3 ± 3.6 37.5 ± 3.1 33.7 ± 2.8 
    5–14 years 33.1 ± 3.0 35.0 ± 3.0 39.1 ± 2.5 
    15+ years 32.6 ± 3.0 27.3 ± 2.4 27.0 ± 2.8 
Smoker (%)    
    Current 16.4 ± 2.6 22.6 ± 2.0 20.4 ± 2.4 
    Former 33.2 ± 3.7 31.4 ± 2.1 34.6 ± 2.4 
    Never 50.5 ± 4.9 46.0 ± 2.4 45.0 ± 2.9 
Diabetes treatment (%)    
    Diabetes pills only 53.2 ± 3.6 56.6 ± 2.4 58.9 ± 3.6 
    Insulin only 16.2 ± 2.2 16.4 ± 3.5 13.6 ± 2.0 
    Pills and insulin 10.7 ± 3.5 9.5 ± 1.8 9.2 ± 1.9 
    Diet only 19.9 ± 3.7 17.5 ± 2.7 18.3 ± 2.8 

Data are means ± SEM.

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