Table 1.
Mean (standard deviation) or proportion for selected characteristics of participants present at the initial examination
| Whites (N=3,073) | Blacks (N=571) | P | |
|---|---|---|---|
| Age (years) | 75.4 (5.0) | 73.9 (5.7) | <0.0001 |
| Men (%) | 42.5 | 37.3 | 0.02 |
| Body mass index (kg/m2) | 26.3 (4.4) | 28.2 (4.9) | <0.0001 |
| Current smokers (%) | 8.5 | 15.0 | <0.0001 |
| Education (years) | 14.3 (4.6) | 12.9 (5.1) | <0.0001 |
| Hypertension (%) | 55.0 | 75.1 | <0.0001 |
| Diabetes (%) | 12.5 | 23.4 | <0.0001 |
| LDL cholesterol (mg/dL) | 127.2 (33.3) | 129.2 (36.4) | 0.19 |
| HDL cholesterol (mg/dL) | 53.0 (14.6) | 57.1 (14.6) | <0.0001 |
| Systolic blood pressure (mm Hg) | 133.9 (20.4) | 140.4 (21.4) | <0.0001 |
| Diastolic blood pressure (mm Hg) | 69.8 (10.5) | 75.3 (10.9) | <0.0001 |
| WML prevalence (%) | 65.6 | 63.9 | 0.44 |
| Brain infarcts prevalence (%) | 27.7 | 28.3 | 0.78 |
| Interleukin 6 (pg/mL) | 2.0 (1.7) | 2.3 (2.1) | <0.0001* |
| C-Reactive Protein (mg/L) | 4.7 (8.4) | 6.3 (8.5) | <0.0001* |
*
P value for comparison of geometric means