Table 1.
Characteristics of CARDIA participants at year 20 (2005–2006)
| Characteristic | Overall(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/m2) | 28.80 ± 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.