Table 1.

Characteristics associated with abnormal clinical markers of CKD in the US population, NHANES 1999 to 2008

AllNumber of Abnormal Clinical Markers of CKD
Zero to OneTwo to FourFive to SevenP
Total, n (%)1852772 (41.68%)1048 (56.58%)32 (1.73%)
Mean estimated GFR ml/min per 1.73 m2 (SD)49.70 (8.41)52.70 (6.60)47.20 (10.12)33.38 (0)
Demographics, %
    Male gender38.2231.1344.9845.51<0.01
    Age<0.01
        20 to 39 years4.135.702.603.52
        40 to 59 years20.9527.3914.7018.40
        60 to 69 years18.8119.5218.2912.57
    ≥70 years56.1147.4064.4165.51
    Race/ethnicitya<0.01
        non-Hispanic white85.6890.6880.8483.31
        non-Hispanic black6.553.199.7012.33
        Mexican American1.931.222.564.35
    Greater than high school education74.3781.5467.3872.55<0.01
    Has social support94.6195.2792.2777.570.04
    Currently married61.8267.4856.6945.690.03
    Non-English language2.761.993.541.850.14
    Yearly family income<0.01
        <$19,99927.7621.3733.4252.06
        $20,000 to 44,99933.6530.2036.8332.97
        $45,000 to 74,99921.8126.9117.234.63
        >$75,00016.9221.5212.5210.34
Access to health care, %
    Has health insurance96.2895.3497.1498.210.14
    Has a routine site for care97.4997.2597.66100.000.70
Comorbid conditions, %
    Diabetes22.0913.0130.2649.82<0.01
  • Analyses have been weighted to reflect the US population. Total n = 1852 for all rows except education (n = 1847), social support (n = 1726), marital status (n = 1813), language (n = 1813), income (n = 1681), insurance (n = 1839), and diabetes (n = 1851). CKD, chronic kidney disease.

  • a Individuals of “other” race/ethnicity not shown because of small sample size but are included in all analyses.