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Table 6 The concordance index of nomograms for internal and external validation

From: Comparing the characteristics and predicting the survival of patients with head and neck melanoma versus body melanoma: a population-based study

 

HNM nomogram validation

BM nomogram validation

Internal

External

Internal

External

CSS

0.839 ± 0.005

0.848 ± 0.008

0.896 ± 0.003

0.889 ± 0.004

OS

0.785 ± 0.004

0.796 ± 0.006

0.842 ± 0.002

0.840 ± 0.004

  1. HNM head and neck melanoma, BM body melanoma, CSS cancer-specific survival, OS overall survival