Table 1.

Demographic and clinical characteristics of adolescents aged 12 to 17 years, NHANES 1999–2002

Creatinine Subsample (n = 3256)Cystatin C Subsample (n = 811)
Mean age, years14.5 (SE 0.05)14.5 (SE 0.08)
Girls, %49.149.7
Race/ethnicity, %
    non-Hispanic black14.714.3
    Mexican11.011.0
    other Hispanic7.87.7
    non-Hispanic white60.057.6
    other (including multiracial)6.69.4
BMI weight category, %
    underweight (<5th percentile)3.34.3
    healthy weight (5th to <85th percentile)64.863.8
    overweight (85th to <95th percentile)14.914.9
    obese (≥95th percentile)17.016.9
Systolic BP, %
    ≥90th percentile5.94.4
    ≥95th percentile3.92.4
Microalbuminuria, %(n = 3220)(n = 799)
    >30 mcg/mg creatinine11.810.4
Macroalbuminuria, %(n = 3220)(n = 799)
    >300 mcg/mg creatinine1.31.4
Anemic, %3.03.1
  • NHANES, National Health and Nutrition Examination Survey; BMI, body mass index.