Prognostic and survival analysis of 837 Chinese colorectal cancer patients

Table 4 Multivariate analysis (Cox proportional hazard model) of prognostic factors

	P value	RR	95%CI
Without interplay tumor node metastasis staging system
Age group	0.060	1.193	0.993-1.434
Obstruction	0.241	1.011	0.993-1.030
Tumor size	0.257	1.002	0.998-1.006
Serum CEA level	0.690	0.996	0.978-1.015
Status of resection	0.082	1.005	0.999-1.012
Histological grade	0.007	0.991	0.984-0.998
Pathological types	0.817	0.999	0.992-1.006
Depth of bowel wall invasion	0.000	1.047	1.028-1.067
Lymphovascular invasion	0.695	0.974	0.854-1.111
Invasion of adjacent organs	0.942	0.998	0.949-1.050
Number of metastatic lymph nodes	0.000	1.093	1.073-1.114
With interplay 6th tumor node metastasis staging system
Age group	0.054	1.194	0.997-1.430
Obstruction	0.386	1.008	0.990-1.028
Tumor size	0.259	1.002	0.998-1.006
Serum CEA level	0.789	0.997	0.979-1.017
Status of resection	0.136	1.005	0.999-1.011
Histological grade	0.114	0.995	0.988-1.001
Pathological types	0.290	0.996	0.989-1.003
Depth of bowel wall invasion	0.014	1.028	1.006-1.050
Lymphovascular invasion	0.758	0.981	0.869-1.108
Invasion of adjacent organs	0.840	0.994	0.935-1.056
Number of metastatic lymph nodes	0.006	1.037	1.010-1.065
6th TNM staging	0.000	1.471	1.344-1.610
With interplay of 7th tumor node metastasis staging system
Age group	0.094	1.168	0.974-1.400
Obstruction	0.434	1.008	0.989-1.027
Tumor size	0.289	1.002	0.998-1.006
Serum CEA level	0.768	0.997	0.978-1.016
Status of resection	0.184	1.004	0.998-1.010
Histological grade	0.109	0.995	0.988-1.001
Pathological types	0.283	0.996	0.989-1.003
Depth of bowel wall invasion	0.023	1.025	1.003-1.048
Lymphovascular invasion	0.779	0.983	0.873-1.107
Invasion of adjacent organs	0.802	0.992	0.930-1.058
Number of metastatic lymph nodes	0.002	1.041	1.015-1.069
7th TNM staging	0.000	1.354	1.261-1.454

RR: Relative risk; CEA: Carcino-embryonic antigen; TNM: Tumor node metastasis.