Fig. 1.

Strong correlations between the glomerular filtration rate (GFR) measurements based on the Modification of Diet in Renal Disease equation and those based on the new equation in the chronic kidney disease patients (A; r=0.79, P<0.0001) and the healthy individuals (B; r=0.36, P=0.01). It is commonly accepted that correlation coefficients (r values) between 0 and 0.2 indicate no correlations, those between 0.2 and 0.4 indicate weak low correlations, those between 0.4 and 0.6 indicate moderate correlations, and those above 0.8 indicate strong correlations.