Table 3. Stage distribution of newly diagnosed breast cancer patients, 2013 (KBCS registry data).

Stage	No. of patients (%)
0	1,749 (14.0)
1	5,152 (41.1)
2	3,895 (31.1)
3	1,121 (9.0)
4	175 (1.4)
Unknown	430 (3.4)
Total	12,522 (100.0)

KBCS=Korean Breast Cancer Society.