Table 1.

Results from the proposed $\text{DRTOP}$ model. HR stands for hazard ratio (exponent of the obtained coefficient).

Clinical outcome	Significant predictors	Concordance index (%)
OS	CT risk (HR: 1.35, p-value: $<0.005$), PET risk (HR: 0.67, p-value: $<0.005$), Age (HR: 1.01, p-value: 0.02)	$68$
RFS	PET risk (HR: 1.18, p-value: $<0.005$), SUV (HR: 1.13, p-value: $<0.005$)	$40$
DC	CT risk (HR: 1.06, p-value: $<0.005$), SUV (HR: 1.09, p-value: 0.02)	$63$
LC	CT risk (HR: 2.66, p-value: 0.03)	$37.5$

Significant predictors are obtained based on an F-test, with a significance level of 0.05. Concordance index is calculated on the test set.