Table 1.

Histologic classification and scoring

Assigned ScoreGlomerulosclerosis, %Interstitial Fibrosis and Tubular Atrophy, %Vascular Disease
0<5<5None
15–105–10Mild
211–2511–25Moderate
3>25>25Severe
  • “Optimal” histology was defined by a score of zero or one for each of the three histologic parameters. In contrast, a score of two or three was given to any parameter designated as “suboptimal.”