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Table 1 Changes of the pair consistency probability C by the number of cutoff points

From: Polychotomization of continuous variables in regression models based on the overall C index

μ d * C** C 1*** C 2*** C 3***
0.691 0.650 0.630 0.648 0.653
0.941 0.700 0.663 0.688 0.695
1.216 0.750 0.700 0.731 0.741
1.517 0.800 0.738 0.775 0.787
1.868 0.850 0.780 0.821 0.835
2.310 0.900 0.828 0.871 0.884
2.965 0.950 0.886 0.925 0.937
  1. * Prognostic variables are assumed to satisfy x [h]~ N(0, 12) and x [d]~ N(μ d , 1.52)
  2. ** Pair consistency probability for the original continuous variable
  3. *** Pair consistency probabilities for the categorized variables where suffixes indicate the number of cutoff points