Spatially varying effects of predictors for the survival prediction of nonmetastatic colorectal Cancer

BMC Cancer

Table 4 Performance Comparison of the Statistical Model and the Machine Learning Model

Performance measurement	Model		Random survival forest
Performance measurement	Cox regression model with mixed effects	AFT model	Random survival forest
C-index on global dataset
Test dataset	0.731 [0.725, 0.737]	0.732 [0.726, 0.738]	0.898 [0.895, 0.902]
C-index among different spatial clusters
Standard deviation	0.037	0.035	0.017
Max-Min difference	0.187	0.172	0.062
Reduced SD^a	reference	−5.41%	−54.05%
Reduced Max-Min^b	reference	−8.02%	−66.84%

^aReduced SD: Reduction in the standard deviation of the C-index for the machine learning model compared with the statistical model
^bReduced Max-Min: Reduction in the Max-Min difference of the machine learning model compared with the statistical model

ISSN: 1471-2407