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Correlation of HER2 Determinations by Combined IHC Scores
| IHC |
HER2/CEP17 Ratio |
||
|---|---|---|---|
| < 2.0 | ≥ 2.0 | Total | |
| 0-2 | 1,046 | 95 | 1,141 |
| 3 | 42 | 170 | 212 |
| Total | 1,088 | 265 | 1,353 |
NOTE. IHC was combined into the following categories: 0-2+ and 3+. Statistics were as follows: κ, 0.65; standard error, 0.02; P < .0001.
Abbreviation: IHC, immunohistochemistry.
