. Author manuscript; available in PMC: 2011 Nov 1.

Published in final edited form as: J Am Soc Hypertens. 2010 Oct 27;4(6):272–283. doi: 10.1016/j.jash.2010.09.005

Table 1.

Clinical characteristics of study population by race.

Characteristic	African- Americans (n=1,605)	Whites (n=4,141)	P for difference
Systolic BP, mmHg	126.1 (0.51)	116.0 (0.25)	<.0001
Diastolic BP, mmHg	78.9 (0.30)	70.8 (0.15)	<.0001
MAP, mmHg	94.6 (0.34)	85.8 (0.17)	<.0001
PP, mmHg	47.2 (0.36)	45.2 (0.18)	<.0001
Hypertension, %	26.6	8.5	<.0001
Age, yrs [min, max]	52.4 (0.14)	53.7 (0.09)	<.0001
Women, %	54.6	48.0	<.0001
Diabetes, %	12.2	6.1	<.0001
Current cigarette smoking, %	31.6	24.8	<.0001
Current drinking, %	37.2	64.6	<.0001
BMI, kg/m²	28.4 (0.14)	26.4 (0.07)	<.0001
Total serum cholesterol, mmol/L	5.5 (0.03)	5.5 (0.02)	0.91
Sport index	2.2 (0.02)	2.6 (0.01)	<.0001
Usual dietary sodium intake, mg	1,384.6 (14.3)	1,525.7 (9.75)	<.0001
Neutrophils, %	48.1	60.2	<.0001
Lymphocytes, %	38.9	31.4	<.0001
Monocytes^¶	5.64 (1.01)	5.47 (1.01)	0.01

Values are means (standard error) or percentages.

^¶

Geometric mean (because of the highly skewed distribution).

Abbreviations: BP, blood pressure; MAP, mean arterial pressure; PP, pulse pressure; BMI, body mass index.