Table 2.

Multivariable cox regression analysis of radiomics signature (RS), TNM stage, and survival in the training and validation cohorts.

Variable	Disease-free Survival
	HR (95% CI)	P-value
Training cohort (N=286)
RS (high vs. low)	0.190(0.112–0.323)	<0.0001
Stage (III vs. II)	2.073(1.389–3.096)	<0.0001
Validation cohort (N=453)
RS (high vs. low)	0.240(0.168–0.343)	<0.0001
Stage (III vs. II)	3.249(2.366–4.461)	<0.0001
CA199 (high vs. low)	1.421(1.078–1.872)	0.013

DFS, Disease-free survival.