Table 1.

Baseline characteristics of 8558 adults of age 30 to 74 yr, in NHANES II, according to racea

CharacteristicAfrican American(n = 894)White(n = 7664)
a NHANES II, Second National Health and Nutrition Examination Survey; CVD, cardiovascular disease.
b Mean ± SEM.
c P < 0.01; all comparisons compare African Americans with whites.
d P < 0.05.
e Serum creatinine measurements were available for 6005 adults. GFR was calculated by using the Cockcroft-Gault equation.
Age (yr)b48.2 ± 0.549.3 ± 0.3
Male (%)45.147.4
Sociodemographic
    education (%)c
        1 to 8th grade31.117.3
        9 to 12th grade52.451.9
        college or more16.530.8
    poverty status (%)c
        poor26.98.3
        near poor33.222.4
        not poor39.969.4
    marital status (%)c
        never married7.44.6
        no longer married34.015.9
        currently married58.679.5
Lifestyle
    smoking status (%)d
        never smoked40.837.9
        former smoker19.226.6
        current smoker40.035.4
    physical activity (%)d
        inactive13.09.9
        moderately active56.262.6
        highly active30.727.6
    alcohol use (%)d
        043.836.4
        <1/wk16.620.8
        1 to 6/wk28.427.9
        ≥1/d11.214.9
    obesity (%)c
        thin to normal (<25 kg/m2)36.949.2
        overweight (25 to 29.9 kg/m2)36.135.2
        obese (≥30 kg/m2)27.015.6
Clinical
    Hypertension (%)c59.547.0
    Diabetes mellitus (%)c7.04.0
    History of CVD (%)c6.56.1
    Systolic BP (mmHg)b,c133.0 ± 0.9129.0 ± 0.6
    Serum cholesterol level (mg/dl)b219.9 ± 3.1223.4 ± 1.1
    GFR (ml/min)b,c,e90.8 ± 1.787.8 ± 0.8