Prognostic and survival analysis of 837 Chinese colorectal cancer patients

Table 2 Univariate analysis of the prognostic factors for patients with colorectal cancer

	n	3-YSR	5-YSR	P value1
Age group (yr)				0.002
Age1 ( ≤ 35)	29	65%	65%
Age2 (36–59)	370	73%	66%
Age3 (60–74)	334	78%	74%
Age4 (≥ 75)	104	61%	53%
Sex				0.834
Male	495	73%	67%
Female	342	74%	69%
Family history of CRC				0.391
Negative	812	73%	68%
Positive	25	91%	82%
Obstruction				0.000
Negative	790	76%	70%
Positive	45	39%	35%
Perforation				0.629
Negative	824	74%	68%
Positive	11	68%	68%
Bleeding				0.116
Negative	289	69%	66%
Positive	546	76%	69%
Diarrhea				0.421
Negative	750	75%	68%
Positive	85	65%	63%
Constipation				0.415
Negative	776	74%	68%
Positive	59	72%	66%
Habits changes				0.547
Negative	531	74%	69%
Positive	304	73%	66%
Serum CEA level				0.042
≤ 5 ng/mL	661	74%	69%
> 5 ng/mL	172	71%	62%
Status of resection				0.000
Curative	711	80%	74%
Palliative	95	29%	22%
Tumor location				0.705
Colon cancer	437	73%	69%
Rectal cancer	394	74%	66%
Double primary of colon and rectal cancer	6	75%	75%
Tumor size				0.004
< 5 cm	516	77%	71%
≥ 5 cm	218	67%	62%
Histological differentiation grade				0.001
Well	212	78%	71%
Moderate	366	73%	65%
Poor	170	62%	60%
Pathological types				0.036
Non-mucous cell carcinoma	663	76%	70%
Mucous cell carcinoma	141	63%	59%
Lymphovascular invasion				0.000
Negative	813	75%	69%
Positive	24	44%	36%
Perineural invasion				0.057
Negative	820	74%	68%
Positive	14	42%	42%
Invasion of adjacent organs				0.000
Negative	781	75%	70%
Positive	52	43%	33%

¹P values were made by log-rank test. 3-YSR: 3-year accumulative survival rate; 5-YSR: 5-year accumulative survival rate; CEA: Carcino-embryonic antigen; CRC: Colorectal cancer.