Table 2.

Time to progression: Kaplan-Meier rates

Patient Variables1-Year Progression Rate (%)3-Year Progression Rate (%)Median Months to Progression
All cases17.339.453.7
Age (years)
    2 to 511.828.678.6
    6 to 1216.038.452.8
    >1221.646.940.9
Gender
    male16.537.957.5
    female18.642.048.0
Race
    white16.337.560.3
    African American19.544.143.9
    Hispanic17.341.247.1
    other21.041.551.8
Primary diagnosis
    obstructive uropathy10.829.467.2
    focal segmental glomerulosclerosis31.761.722.9
    renal dysplasia14.339.354.0
    reflux nephropathy10.528.488.5
    other18.239.752.3
CKD stage
    stage II3.515.4137.7
    stage III8.628.867.8
    stage IV43.074.515.5
Hypertension
    yes21.044.843.8
    no14.234.563.7
Laboratory values at registration
    anemia
        HCT ≥33%10.328.277.3
        HCT <33%29.057.626.2
    calcium
        low33.553.329.1
        normal16.939.352.7
        high17.140.355.6
    phosphorus
        normal10.929.870.1
        high32.362.523.6
    albumin
        ≤4.0 g/dl24.552.232.2
        >4.0 g/dl10.427.674.6
Medication use at registration
    anti-hypertensive medication use
        yes21.545.742.7
        no13.734.164.0
    erythropoietin use
        yes40.968.817.7
        no13.734.861.2
    iron supplementation
        yes29.256.328.8
        no13.534.063.7