Table6.

Subgroup analysis of Ki-67 and the status of ER and PR

Subgroups	Factor	No. of positive events	No. of negative events	P
Ki-67≤20%	Chemotherapy	0	11
	Non-chemotherapy	1	44	0.674
Ki-67>20%	Chemotherapy	3	13
	Non-chemotherapy	4	32	0.105
ER(+)/PR(+)	Chemotherapy	2	3
	Non-chemotherapy	0	69	0.083
ER(-) PR(-)	Chemotherapy	1	23
	Non-chemotherapy	5	10	0.014