Table I.

Subject Demographics

Total number of subjects	49; 75% female, 25% male
Age	Mean, 56; range, 25–75 years
Ethnic composition	African American, 73%, Caucasian, 25%; other, 2%
Educational level	Mean, 13 years (1 year beyond high school); range, 8–18
Duration of hypertension	Mean, 10 years; range, 1–30 years