|  | YY1 | |||
---|---|---|---|---|---|
 |  | Negative | Positive | χ2 | P-value |
HER-2 Gene Expression | Normal | 315 (40.6%) | 190 (49.4%) | 13.115 | 0.004 |
 | Amplified | 68 (8.8%) | 16 (4.2%) |  |  |
 | Gain | 13 (1.7%) | 7 (1.8%) |  |  |
HER-2 Protein Expression | 0 | 366 (67.3%) | 178 (32.7%) | 19.882 | <0.001 |
 | 1+ | 13 (39.4%) | 20 (60.6%) |  |  |
 | 2+ | 21 (4.7%) | 7 (3.3%) |  |  |
 | 3+ | 51 (11.3%) | 10 (4.7%) |  |  |