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Table 4 Comparison between DFS in risk groups of the newly formed KNPI and the original NPI

From: Prognostic contribution of mammographic breast density and HER2 overexpression to the Nottingham Prognostic Index in patients with invasive breast cancer

  New Classification KNPI Original NPI p
Group Patients (%) DFS Patients (%) DFS
Low risk 124 (45.9) 92.7 % (115/124) 58 (21.5) 91.4 % (53/58) <0.001
Intermediate risk 55 (20.4) 80.0 % (44/55) 127 (47.0) 87.4 % (111/127)
High risk 91 (33.7) 45.1 % (41/91) 85 (31.5) 42.4 % (36/85)
C Index 0.872 0.779  
  1. The distribution of patients into the newly formed low, intermediate and high risk groups of the Kuopio-Nottingham Prognostic Index with their respective Disease Free Survival, compared to the old categories of the original Nottingham Prognostic Index