Table 3.

C-index in the development and test datasets for various models for predicting 3- and 5-year disease-specific survival of oral and pharyngeal cancers based on the complete case analysis.

Modelling Approaches	Development Dataset (80%) (Median (IQR))	Test Dataset (20%) (Median (IQR))
Three-Year Survival Cohort
Cox	0.77 (0.77, 0.77)	0.76 (0.76, 0.77)
Survival tree (ST)	0.70 (0.70, 0.70)	0.70 (0.69, 0.71)
Random forest for survival (RF)	0.83 (0.83, 0.84)	0.77 (0.76, 0.77)
Conditional inference forest (CF)	0.83 (0.83, 0.86)	0.76 (0.75, 0.76)
Five-Year Survival Cohort
Cox	0.76 (0.76, 0.76)	0.76 (0.76, 0.76)
Survival tree (ST)	0.69 (0.69, 0.70)	0.69 (0.68, 0.70)
Random forest for survival (RF)	0.83 (0.83, 0.83)	0.76 (0.76, 0.76)
Conditional inference forest (CF)	0.85 (0.84, 0.86)	0.75 (0.75, 0.76)