Table 1.

Characteristics of the Sample from the National Health and Nutrition Examination Survey 1999 to 2004

Unweighted (n)5234
Weighted (n)172,626,805
Diabetes (%)
    Diagnosed diabetes7.0
    Undiagnosed diabetes2.6
    Impaired fasting glucose25.5
    Normal64.9
Hepatitis B core antibody
    Positive (%)6.0
Hepatitis C core antibody
    Positive (%)1.5
CRP (%)
    Low (<0.3 mg/dL)61.3
    High (≥0.3 mg/dL)38.7
GGT (%)
    Low (<29.48 u/l)74.6
    High (≥29.48 u/l)25.4
AST (%)
    Low (<25.51 u/l)73.2
    High (≥25.51 u/l)26.8
ALT (%)
    Low (<27.78 u/l)73.0
    High (≥27.78 u/l)27.0
Age (%)
    20 to 44 years50.5
    45 to 64 years33.3
    ≥65 years16.1
Gender (%)
    Male46.0
    Female54.0
Race/Ethnicity (%)
    Non-Hispanic white72.3
    Non-Hispanic black10.9
    Hispanic12.6
    Other4.1
Body mass index (kg/m2)
    <25.035.0
    25.0–29.933.9
    ≥30.031.1
Previously diagnosed (%)
    High cholesterol
        Yes27.7
        No or not tested72.3
    Hypertension
        Yes27.2
        No72.8

  • CRP, C-reactive protein; GGT, γglutamyl transferase; AST, aspartate aminotransferase; ALT, alanine aminotransferase.