Table 3.

Estimating formulas for longitudinal prediction of visit 2 GFR using a visit 1 iGFR measurement and changes in biomarker values between the two visits

Embedded Image

ModelabcdefR2 (%)% within 30%% within 10% Embedded Imagea
None40.78 ± 1.140000048170.414
I39.68 ± 0.610.996 ± 0.04400007080430.229
IIa40.48 ± 0.550.912 ± 0.0390.514 ± 0.0580007885410.197
IIb39.88 ± 0.590.978 ± 0.0430−0.206 ± 0.046007380430.219
IIc39.56 ± 0.580.999 ± 0.04200−0.947 ± 0.19707381440.218
III40.37 ± 0.530.919 ± 0.0380.431 ± 0.061−0.089 ± 0.042−0.579 ± 0.17807984470.190
IV40.20 ± 0.530.921 ± 0.0380.405 ± 0.061−0.100 ± 0.042−0.543 ± 0.177−0.172 ± 0.0718086450.188
  • Formulas have parameters estimated in a training set of 220 children.

  • a Of the log-transformed iGFR2.