Table 3.

Comparison of the performance of the ML model, the Cox-derived score, and the CIBMTR model

ML modelML modelCox-derived scoreCox-derived score
4 groups4 groups
OS risk score for mortality prediction (Harrell C-index)
Training set (n = 1773)  0.603 0.596 0.594 0.589 
Test set (n = 566)  0.612 0.608 0.587 0.580 
 ML model ML model  CIBMTR model 
4 groups 3 groups 
Training set (n = 1925)  0.608 0.599  0.557 
Test set (n = 618)  0.654 0.650  0.581 
OS risk score for mortality prediction (AIC) 
 ML model ML model Cox-derived score Cox-derived score 
4 groups 4 groups 
Training set (n = 1773)  9 944 9 954 9945 9 954 
Test set (n = 566)  2 757 2 759 2765 2 767 
 ML model ML model  CIBMTR model 
4 groups 3 groups 
Training set (n = 1925)  12 573 12 588  12 647 
Test set (n = 618)  3 318 3 322  3 374 
OS risk score for NRM prediction (AIC) 
 ML model ML model Cox-derived score Cox-derived score 
4 groups 4 groups 
Training set (n = 1763)  7 210 7 210 7208 7 214 
Test set (n = 566)  2 006 2 002 2008 2 006 
 ML model ML model  CIBMTR model 
4 groups 3 groups 
Training set (n = 1925)  8 738 8 738  8 762 
Test set (n = 618)  2 154 2 160  2 182 
ML modelML modelCox-derived scoreCox-derived score
4 groups4 groups
OS risk score for mortality prediction (Harrell C-index)
Training set (n = 1773)  0.603 0.596 0.594 0.589 
Test set (n = 566)  0.612 0.608 0.587 0.580 
 ML model ML model  CIBMTR model 
4 groups 3 groups 
Training set (n = 1925)  0.608 0.599  0.557 
Test set (n = 618)  0.654 0.650  0.581 
OS risk score for mortality prediction (AIC) 
 ML model ML model Cox-derived score Cox-derived score 
4 groups 4 groups 
Training set (n = 1773)  9 944 9 954 9945 9 954 
Test set (n = 566)  2 757 2 759 2765 2 767 
 ML model ML model  CIBMTR model 
4 groups 3 groups 
Training set (n = 1925)  12 573 12 588  12 647 
Test set (n = 618)  3 318 3 322  3 374 
OS risk score for NRM prediction (AIC) 
 ML model ML model Cox-derived score Cox-derived score 
4 groups 4 groups 
Training set (n = 1763)  7 210 7 210 7208 7 214 
Test set (n = 566)  2 006 2 002 2008 2 006 
 ML model ML model  CIBMTR model 
4 groups 3 groups 
Training set (n = 1925)  8 738 8 738  8 762 
Test set (n = 618)  2 154 2 160  2 182 

Analyses performed on the subset of patients with complete data on the variables included in the Cox-derived score and the CIBMTR model to minimize biases.

Higher C-index values reflect better model performance in ranking predictions whereas lower AIC values indicate a better fit to the data.

Cox-derived score.

CIBMTR model.

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