Table 7. Stage-specific 5- and 10-year overall survival rates (2001–2012, Korean Breast Cancer Society registry data).

Stage	No. of patients	No. of events	5-Year survival rate (%)	10-Year survival rate (%)
0	12,285	266	98.3	95.4
I	39,284	1,557	96.6	92.7
II	40,024	3,951	91.8	84.8
III	13,774	6,544	75.8	63.4
IV	1,619	1,029	34.0	22.2
Unknown	2,998	343	-	-
Total	109,988	10,690	91.2	84.8