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Table 5 Harrell’s concordance indexes for the different modalities

From: Combination of computed tomography imaging-based radiomics and clinicopathological characteristics for predicting the clinical benefits of immune checkpoint inhibitors in lung cancer

Modalities Training cohort (n = 64) Validation cohort (n = 28)
  C-index 95%CI Brier score C-index 95%CI Brier score
Radiomics model2 0.717 (0.612, 0.822) 0.178 0.760 (0.574, 0.946) 0.187
Radiomics nomogram mode2 0.749 (0.643, 0.854) 0.187 0.791 (0.605, 0.978) 0.209
  1. C-index, concordance index