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Table 3 The NRI and IDI were used to assess reclassification performance and improvement in discrimination of our novel prediction model

From: A novel clinical model for predicting malignancy of solitary pulmonary nodules: a multicenter study in chinese population

  NRI P Value IDI P Value
Training cohort
 Our model vs. PKUPH model 0.177 0.005 − 0.019 0.433
 Our model vs. Shanghai model 0.127 0.058 − 0.076 0.005
 Our model vs. Mayo model 0.396 < 0.001 0.112 < 0.001
External validation cohort
 Our model vs. PKUPH model -0.035 0.726 − 0.043 0.341
 Our model vs. Shanghai model 0.027 0.769 − 0.017 0.709
 Our model vs. Mayo model 0.249 0.008 0.086 < 0.001
  1. NRI net reclassification improvement index, IDI integrated discrimination improvement index