Table 5. Relationship between IHC and RT-PCR results.
| All patients | Node-negative patients | Node-positive patients | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ER | PR | Ki67 | ER | PR | Ki67 | ER | PR | Ki67 | |
| Concordance between IHC and RT-PCR (%) | 98.8 | 88.3 | / | 98.7 | 87.5 | / | 99.1 | 94.3 | / |
| Spearman's correlation between IHC and RT-PCR | 0.362 | 0.676 | 0.446 | 0.356 | 0.683 | 0.449 | 0.418 | 0.624 | 0.462 |
| Spearman's correlation between IHC and RS | −0.224 | −0.434 | 0.303 | −0.213 | −0.439 | 0.290 | −0.328 | −0.397 | 0.402 |
Abbreviations: IHC, immunohistochemistry; RT-PCR, reverse transcriptase-polymerase chain reaction; RS, recurrence score; ER, estrogen receptor; PR, progesterone receptor.