Table 2—

Age-adjusted prevalence of the metabolic syndrome among U.S. adults aged ≥20 years by cardiovascular risk factors and conditions, NHANES 1999–2002

nNCEP definitionIDF definition
BMI (kg/m2)
    <18.5505.2 ± 3.1*0.0
    18.5 to <251,13610.4 ± 1.113.3 ± 0.8
    25 to <301,31034.3 ± 0.944.3 ± 1.5
    ≥301,06364.2 ± 2.265.1 ± 2.2
Glucose status
    Normoglycemia2,13116.8 ± 0.921.1 ± 1.2
    Impaired fasting glucose1,06860.1 ± 1.966.4 ± 1.7
    Undiagnosed diabetes14275.0 ± 6.275.5 ± 6.4
    Diagnosed diabetes25972.1 ± 5.184.4 ± 3.4
Hypertension
    Yes1,31162.9 ± 3.369.4 ± 2.8
    No2,29025.0 ± 1.229.1 ± 1.1
Smoking status
    Current79935.2 ± 1.938.1 ± 2.1
    Former98031.8 ± 1.639.2 ± 2.2
    Never1,81634.3 ± 1.638.6 ± 1.6
Total cholesterol ≥200 mg/dl     or use of cholesterol-    lowering medications
    Yes1,96938.1 ± 1.544.2 ± 1.8
    No1,63231.3 ± 1.434.4 ± 1.5
Concentrations of C-reactive protein (mg/l)
    <192318.8 ± 1.323.5 ± 1.6
    1–31,23533.8 ± 1.138.4 ± 1.5
    >31,44347.3 ± 1.651.9 ± 1.5
Coronary heart disease
    Yes13672.4 ± 4.675.8 ± 4.7
    No3,44334.3 ± 1.038.8 ± 1.1
Myocardial infarction
    Yes14836.1 ± 3.541.1 ± 3.8
    No3,44834.3 ± 1.038.7 ± 1.0
Angina pectoris
    Yes12444.1 ± 4.346.5 ± 4.5
    No3,46034.2 ± 0.938.8 ± 1.0
  • Data are percent ± SE.

  • *

    * Estimate should be interpreted cautiously because the estimates do not meet the criteria for reliability and precision.