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Table 4 Mean optimism and corrected c-index over 100 boostrapped samples

From: Combined performance of screening and variable selection methods in ultra-high dimensional data in predicting time-to-event outcomes

  Weak signal (n = 300) Strong signal (n = 300)
Optimism C-index corrected Optimism C-index corrected
ISIS-LASSO 0.010 0.654 0.005 0.794
ISIS-ALASSO 0.010 0.655 0.005 0.794
ISIS-RSF 0.010 0.641 0.005 0.791
SIS 0.008 0.426 0.007 0.627
SIS-LASSO 0.007 0.431 0.007 0.627
SIS-ALASSO 0.006 0.431 0.007 0.627
SIS-RSF 0.008 0.416 0.007 0.624
PSIS * * 0.119 0.770
PSIS-LASSO 0.082 0.745 0.043 0.836
PSIS-ALASSO 0.042 0.772 0.019 0.844
PSIS-RSF 0.026 0.574 0.016 0.721
LASSO 0.045 0.808 0.048 0.903
ALASSO 0.057 0.648 0.058 0.781
  1. *Did not converge