Table 1.

Demographic characteristics and hemodynamics in African American and Caucasian subjects

	African American (n = 41)	Caucasian (n = 39)	P value
Age (years)	36±6	33±6	0.033
Sex (% female)	56	26	0.009
Body mass index (kg/m 2 )	27.9±4	26.2±3.2	0.022
Body surface area (m 2 )	1.97±0.20	1.97±0.19	0.934
Clinic systolic blood pressure (mm Hg)	140±13	136±9	0.093
Clinic diastolic blood pressure (mm Hg)	91±10	87±7	0.018
24-hour systolic blood pressure (mm Hg)	133±11	131±8	0.324
24-hour diastolic blood pressure (mm Hg)	83±7	82±5	0.239
Heart rate (bpm)	67±11	71±12	0.129
Stroke volume index (ml/m 2 )	42±11	51±16	0.007
Cardiac index (l/min/m 2 )	2.7±0.6	3.5±0.8	<0.001
Systemic vascular resistance index (dyne-s-cm -5 /m 2 )	2,853±662	2,263±566	<0.001
Minimum forearm vascular resistance	3.72±1.4	2.88±1.05	0.004