TABLE 1—

Sociodemographic and Health Characteristics by Race and Gender: National Health and Nutrition Examination Survey, United States, 2001-2008

	Men			Women
Characteristic	White (n = 4138), Mean ±SD, Median (IQR), or %	Black (n = 1489), Mean ±SD, Median (IQR), or %	P	White (n = 3876), Mean ±SD, Median (IQR), or %	Black (n = 1468), Mean ±SD, Median (IQR), or %	P
Systolic blood pressure, mm Hg	123.1 ±14.8	126.3 ±16.6	< .001	120.7 ±19.2	123.8 ±20.7	< .001
Diastolic blood pressure, mm Hg	72.9 ±11.4	74.0 ±13.0	< .001	70.4 ±7.2	71.9 ±12.8	< .001
Pulse pressure, mm Hg	50.1 ±14.7	52.2 ±15.4	< .01	50.3 ±18.5	51.9 ±18.1	< .05
Blood lead, μg/dL
Median	1.7 (1.2–2.5)	1.8 (1.2–2.8)		1.2 (0.8–1.8)	1.3 (0.8–2.0)
Mean	1.7 ±1.8	1.9 ±1.9	< .01	1.2 ±1.8	1.4 ±1.9	< .001
Age, y	45.6 ±15.8	40.6 ±14.4	< .001	47.3 ±16.7	42.4 ±15.1	< .001
Education < high school	10	27	< .001	11	24	< .001
Poverty income ratio < 1.85	18	42	< .001	23	47	< .001
Antihypertensive medication use	18	18		20	27	< .001
Diabetes	8	11		8	12	< .01
Smoking status
Never	44	48		55	67	< .001
Former	29	15	< .001	22	11	< .001
Current	27	36	< .001	22	22
Heavy alcohol use	20	23		11	9
Body mass index, kg/m2	28.2 ±5.6	28.2 ±6.1		27.5 ±6.6	30.8 ±7.7	< .001
Hematocrit, %	45.3 ±3.3	44.1 ±3.5	< .001	40.7 ±2.0	38.5 ±3.7	< .001
Dietary calcium, mg/d	1103 ±718	866 ±626	< .001	838 ±496	633 ±467	< .001
Dietary potassium, mg/d	3305 ±1456	2744 ±1421	< .001	2415 ±1046	2021 ±1113	< .001
Dietary sodium, mg/d	4281 ±2076	4044 ±2223	< .05	2966 ±1416	2828 ±1641	< .05

Note. IQR = interquartile range. All results were weighted to account for complex survey design. Tests for significance not performed on medians.