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Changes of HR, HER-2 and Ki-67 status between NAC and control groups [%(n)]
| Group | NAC (n = 79) | Control (n = 82) | X2 | P value |
|---|---|---|---|---|
| ER | 12.7 (10/79) | 2.4 (2/82) | 6.092 | P = 0.014 |
| PR | 24 (19/79) | 4.9 (4/82) | 12.079 | P = 0.001 |
| HER-2 | 5 (4/79) | 2.4 (2/82) | 0.772 | P = 0.379 |
| Ki-67 | 38.0 (30/79) | 7.3 (6/82) | 21.784 | P < 0.001 |
ER, estrogen receptor; HER-2, human epidermal growth factor receptor-2; HR, hormone receptor; NAC, neoadjuvant chemotherapy; PR, progesterone receptor.
