Table 5.

Cox proportional hazards model for overall survival

Variable	Hazard ratio (95% CI)	P-value
Charlson comorbidity index ≤2 versus >2	1.205 (0.651–1.558)	0.128
TNM stage of colorectal cancer I–II versus III	1.981 (1.258–3.854)	0.021
Disease-free interval ≥12 versus <12 months	1.610 (1.378–2.873)	0.015
Tumor number <3 versus ≥3	1.500 (1.258–1.870)	0.041