Table 6.

Multivariate overall survival analysis of different clinical stages in left-sided and right-sided CRC

	RS	LS HR (95% CI)
Stage at presentation
Stage 0	1.00	0.79 (0.68–0.93)*
Stage I	1.00	0.79 (0.77–0.82)**
Stage II	1.00	0.89 (0.87–0.91)**
Stage III	1.00	0.74 (0.73–0.76)**
Stage IV	1.00	0.74 (0.73–0.76)**
All Stages	1.00	0.81 (0.8–0.82)**

** p < 0.001, *p < 0.05; CI confidence interval, HR hazard ratio. The classification criteria of stages refer to the AJCC/UICC TNM staging system. Right-sided (RS) CRC includes cancers located in the cecum, ascending colon, and transverse colon, and left-sided (LS) CRC includes those located in the descending colon, sigmoid colon, and rectum. The LS group was set to 1 as the control group