Table 2: Univariate analysis of patient’s characteristics for overall survival

	No. of patients	Median survival (months)	5-year survival (%)	P
Age at primary (years) 　　　＜50 　　　＞50	21 12	81.2 30.9	73.0 25.0	0.1623
Age at LM (years) 　　　＜50 　　　＞50	15 18	72.8 57.0	76.0 38.9	0.0986
ER* status 　　positive 　　negative	14 14	66.3 40.9	65.1 35.7	0.3075
PgR† status 　　positive 　　negative	11 16	64.8 41.9	77.8 31.3	0.0937
HER2‡ status 　　positive(2+, 3+) 　　negative(-, +)	7 14	67.7 47.9	50.0 59.7	0.8186
Timing of detection of BCLM 　　synchronus 　　metachronous	6 27	32.6 74.7	33.3 58.7	0.2302
No. of BCLM 　　solitary 　　>1	13 20	77.6 58.0	90.9 33.0	0.2005
Maximal BCLM size (mm) 　　<30 　　>30	17 16	73.8 55.2	61.4 45.7	0.7731
Extrahepatic metastases ator before liver surgery 　　Yes 　　No	13 20	41.4 83.5	27.5 68.0	0.0153

*estrogen-receptor; †progesterone-receptor; ‡human epidermal growth factor receptor 2