Table 2. Univariate and multivariate Cox analyses of risk factors of overall survival.

Variable	Univariate Cox regression			Multivariate Cox regression
	OR (95% CI)	P value		OR (95% CI)	P value
Gender (male vs. female)	1.261 (0.713–1.556)	0.564		–	–
Age (<60 vs. ≥60 years)	0.861 (0.637–1.213)	0.340		–	–
Tumor site	0.723 (0.556–1.013)	0.452		–	–
Differentiation	1.121 (0.872–1.334)	0.513		–	–
TNM stage	1.556 (1.221–2.314)	0.021		1.226 (1.101–2.007)	0.033
T stage (T1–2 vs. T3–4)	1.176 (1.108–1.987)	0.034		1.012 (1.007–1.875)	0.042
N stage (N0 vs. N1–3)	1.137 (0.891–1.732)	0.071		–	–
Radiomics signature	2.334 (1.210–3.116)	0.009		2.018 (1.133–3.721)	0.012