Table 6. The single factor analysis of the colorectal liver metastases survival time.

	No.	The median survival time	one year survival rate	Three-year survival rate	Five-year survival rate	P
Sex						0.217
Male	21	27	75	33	19
Female	19	32.2	77	45	16
Age						0.583
<62	23	29.4	76	40	29
≥62	17	27.5	75	35	20
Site						0.061
Colon	22	37.3	83	52	24
Rectal	18	25.6	74	33	27
Size						0.835
<5 cm	27	30.4	76	38	22
≥5 cm	13	24	73	30	14
Pathological type						0.645
Fungating type	13	30.8	79	36	14
Ulcer type	27	26.5	75	32	11
Histological type						0.337
Adenocarcinoma	38	29.8	75	44	21
Mucinous adenocarcinoma	2	27.8	72	33	17
Differentiation						0.046
I–ii	19	39.5	77	42	23
Iii–iv	21	26.2	75	34	19
Infiltration depth						0.345
T1–t2	10	27.1	74	32	20
T3–t4	30	29.9	77	42	25
Lymphatic metastasis						0.028
(–)	28	39.6	76	43	17
(+)	12	27.1	71	33	10
Cancerous node						0.69
(–)	23	29.7	76	40	19
(+)	17	28.2	73	37	12
Lymphatic or blood vessel invasion						0.001
No	8	23.1	98	38	17
Yes	32	19.3	69	21	5
Perineural invasion						0.365
No	25	31.4	78	42	27
Yes	15	24.7	73	33	15
Cugbp1						0.012
<0.5	18	22.5	78	56	41
≥0.5	22	18.2	71	39	27

Univariate analysis was calculated using the Kaplan–Meier method (the log-rank test). HR, hazard ratio; CI, confidence interval; TNM, tumor-node-metastasis.