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Table 4 The c-index values for performance of the multivariate model and the TNM classification for prediction of SMAD and SMFS in the training set and validation set

From: Development and external validation of nomograms to predict the risk of skeletal metastasis at the time of diagnosis and skeletal metastasis-free survival in nasopharyngeal carcinoma

Model

Training set

Validation set

 

C-index

95% CI

P-value

C-index

95% CI

P-value

Nomograms (SMAD)

0.83

0.78–0.87

0.005

0.76

0.71–0.79

< 0.001

TNM classification (SMAD)

0.73

0.70–0.77

 

0.64

0.60–0.67

 

Nomograms (SMFS)

0.70

0.67–0.74

< 0.001

0.61

0.55–0.0.66

0.005

TNM classification (SMFS)

0.59

0.56–0.63

 

0.58

0.54–0.63

 
  1. Abbreviations: SMAD skeletal metastasis at the time of diagnosis, SMFS skeletal metastasis-free survival
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BMC Cancer

ISSN: 1471-2407

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