Impact of primary colorectal cancer site on surgical outcomes for liver metastases: A retrospective study

Table 1 General information comparison of 178 patients with colorectal cancer liver metastases, n (%)

Project	Control group (n = 90)	Relapse group (n = 88)	χ2 value	P value
Age			1.71	0.079
< 60 years old	29 (32.22)	35 (39.77)
≥ 60 years old	61 (67.78)	53 (60.23)
Gender			2.84	0.060
Male	51 (56.67)	55 (62.50)
Female	39 (43.33)	33 (37.50)
Maximum diameter of tumor			1.42	0.090
< 5 cm	52 (57.78)	59 (67.05)
≥ 5 cm	38 (42.22)	29 (32.95)
Primary site			7.44	0.016
Left colon	17 (7.78)	23 (26.14)
Right hemicolon	21 (23.34)	49 (55.68)
Rectum	52 (57.78)	16 (18.18)
T installment			2.05	0.068
T1-T2	46 (51.11)	43 (48.86)
T3-T4	44 (48.89)	45 (41.14)
Degree of differentiation			4.54	0.044
Low	21 (23.33)	46 (52.27)
Middling	31 (34.44)	28 (31.82)
Tall	38 (42.23)	14 (15.91)
Lymph node metastasis			6.88	0.022
Yes	37 (41.11)	81 (92.05)
No	53 (58.89)	7 (7.95)
Invasion depth			7.85	0.013
Subserosal	22 (24.44)	34 (38.64)
Gull-thickness	29 (32.22)	42 (47.73)
Muscularis	29 (32.22)	12 (13.63)
Mucosal layer	10 (11.12)	0 (0.00)
Pathological biopsy
Protruded type	40 (44.44)	16 (18.18)
Infiltrative ulcer type	50 (55.56)	72 (81.82)
Vascular cancer thrombus			2.54	0.063
Yes	18 (20.00)	8 (9.09)
No	72 (80.00)	80 (90.91)
Number of liver metastases			1.36	0.243
1 piece	55 (61.11)	46 (52.27)
> 1 piece	35 (38.89)	42 (47.73)
Surgical margin of liver metastases			28.30	0.005
< 1 cm	13 (14.44)	50 (56.82)
≥ 1 cm	77 (85.56)	33 (43.18)
Liver metastasis area			1.44	0.089
Simple leaf	39 (43.33)	34 (38.64)
Double leaf	51 (56.67)	54 (61.36)
Simultaneous liver resection			0.24	0.627
Yes	74 (82.22)	67 (76.14)
No	16 (17.78)	21 (23.86)
Lung metastasis			2.09	0.148
Yes	15 (16.67)	19 (21.59)
No	75 (83.33)	69 (78.41)