Repeat ablation and single-session ablation in patients with multiple colorectal cancer liver metastases after chemotherapy failure

Table 1 Characteristics of patients in single-session and repeat ablation

Variables	Single	Repeat	P value
No. of patient	42	38
Age	58.69 ± 12.2	59.39 ± 8.45	0.977
Size (max, cm)	1.9 (1.1)	1.8 (1.0)	0.958
Sex			0.954
Male	28	25
Female	14	13
Quantity	2 (1)	3 (2)	0.000a
Time	1	2 (1)	0.000a
Primary lesion			0.287
Colon	16	19
Rectum	26	19
Pathological differentiation			0.557
Medium-high	34	34
Poorly	6	4
Hepatectomy	5	12	0.002
Extrahepatic metastases
Regional	22	9	0.000a
Distant	4	1	0.000a

^aP < 0.05.