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Table 1

Characteristics of CARDIA participants at year 20 (2005–2006)

CharacteristicOverall(N = 2,456)AA(n = 999)Whites(n = 1,457)P
Age (years) 45.29 ± 3.56 44.59 ± 3.81 45.78 ± 3.30 <0.0001 
Male (%) 43.04 38.24 46.33 <0.0001 
BMI (kg/m228.80 ± 6.39 30.55 ± 6.81 27.60 ± 5.78 <0.0001 
Waist circumference (cm) 90.42 ± 14.35 92.37 ± 14.18 89.08 ± 14.31 <0.0001 
Parental history of diabetes (%) 17.79 22.82 14.34 <0.0001 
Systolic blood pressure (mmHg) 114.58 ± 14.07 118.62 ± 15.43 111.81 ± 12.32 <0.0001 
HDL cholesterol (mg/dL) 54.87 ± 16.65 55.24 ± 16.16 54.62 ± 16.98 0.37 
Triglycerides (mg/dL) 106.16 ± 73.15 94.32 ± 68.28 114.27 ± 75.27 <0.0001 
Fasting glucose (mg/dL) 94.33 ± 9.35 93.72 ± 10.37 94.74 ± 8.56 <0.01 
A1C (%) 5.34 ± 0.37 5.46 ± 0.41 5.26 ± 0.31 <0.0001 
A1C (mmol/mol) 35 ± 4.0 36 ± 4.5 34 ± 3.4 <0.0001 
Prediabetes (%) 39.05 46.55 33.91 <0.0001 
CharacteristicOverall(N = 2,456)AA(n = 999)Whites(n = 1,457)P
Age (years) 45.29 ± 3.56 44.59 ± 3.81 45.78 ± 3.30 <0.0001 
Male (%) 43.04 38.24 46.33 <0.0001 
BMI (kg/m228.80 ± 6.39 30.55 ± 6.81 27.60 ± 5.78 <0.0001 
Waist circumference (cm) 90.42 ± 14.35 92.37 ± 14.18 89.08 ± 14.31 <0.0001 
Parental history of diabetes (%) 17.79 22.82 14.34 <0.0001 
Systolic blood pressure (mmHg) 114.58 ± 14.07 118.62 ± 15.43 111.81 ± 12.32 <0.0001 
HDL cholesterol (mg/dL) 54.87 ± 16.65 55.24 ± 16.16 54.62 ± 16.98 0.37 
Triglycerides (mg/dL) 106.16 ± 73.15 94.32 ± 68.28 114.27 ± 75.27 <0.0001 
Fasting glucose (mg/dL) 94.33 ± 9.35 93.72 ± 10.37 94.74 ± 8.56 <0.01 
A1C (%) 5.34 ± 0.37 5.46 ± 0.41 5.26 ± 0.31 <0.0001 
A1C (mmol/mol) 35 ± 4.0 36 ± 4.5 34 ± 3.4 <0.0001 
Prediabetes (%) 39.05 46.55 33.91 <0.0001 

Data are means ± SD unless otherwise indicated.

†Comparison by χ2 for categorical variables and unpaired t tests for continuous variables.

‡Prediabetes defined as fasting glucose 100–125 mg/dL, A1C 5.7–6.4%, or oral glucose tolerance test 140–199 mg/dL.

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