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Table 1

Participant characteristics by A1C category among persons without a history of diagnosed diabetes: ARIC and NHANES III study populations

ARIC study population (n = 12,485)
NHANES III subpopulation (n = 691)
A1C <6.5%A1C ≥6.5%A1C <6.5%A1C ≥6.5%
n 11,925 (95.5) 460 (4.49) 660 (95.5) 31 (4.5) 
Age (years) 56.8 ± 5.7 57.8 ± 5.7 46.7 ± 17.5 57.8 ± 14.3 
Male sex (%) 44.5 41.6 49.1 58.1 
African American (%) 20.9 50.4 28.2 61.3 
Less than high school education (%) 19.4 34.9 34.5 58.1 
BMI (kg/m227.5 ± 5.1 32.4 ± 6.2 27.7 ± 6.3 30.4 ± 4.9 
Obese (%) 25.2 60.8 28.5 54.8 
Current smoker (%) 22.2 23.5 27.7 16.1 
Hypertension (%) 32.4 57.2 27.4 58.1 
Total cholesterol (mg/dl) 209.2 ± 38.5 218.3 ± 41.9 206.1 ± 42.1 215.4 ± 40.5 
HDL cholesterol (mg/dl) 50.5 ± 16.8 43.1 ± 14.0 50.5 ± 14.7 46.1 ± 15.7 
Triglycerides (mg/dl) 110.0 (80.0, 155.0) 140.0 (101.0, 199.0) 113.0 (82.0, 167.5) 181.0 (141.0, 229.0) 
Family history of diabetes (%) 22.1 33.9 22.4 19.4 
ARIC study population (n = 12,485)
NHANES III subpopulation (n = 691)
A1C <6.5%A1C ≥6.5%A1C <6.5%A1C ≥6.5%
n 11,925 (95.5) 460 (4.49) 660 (95.5) 31 (4.5) 
Age (years) 56.8 ± 5.7 57.8 ± 5.7 46.7 ± 17.5 57.8 ± 14.3 
Male sex (%) 44.5 41.6 49.1 58.1 
African American (%) 20.9 50.4 28.2 61.3 
Less than high school education (%) 19.4 34.9 34.5 58.1 
BMI (kg/m227.5 ± 5.1 32.4 ± 6.2 27.7 ± 6.3 30.4 ± 4.9 
Obese (%) 25.2 60.8 28.5 54.8 
Current smoker (%) 22.2 23.5 27.7 16.1 
Hypertension (%) 32.4 57.2 27.4 58.1 
Total cholesterol (mg/dl) 209.2 ± 38.5 218.3 ± 41.9 206.1 ± 42.1 215.4 ± 40.5 
HDL cholesterol (mg/dl) 50.5 ± 16.8 43.1 ± 14.0 50.5 ± 14.7 46.1 ± 15.7 
Triglycerides (mg/dl) 110.0 (80.0, 155.0) 140.0 (101.0, 199.0) 113.0 (82.0, 167.5) 181.0 (141.0, 229.0) 
Family history of diabetes (%) 22.1 33.9 22.4 19.4 

Data are n (%), means ± SD, median (25th percentile, 75th percentile), or proportions (%).

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