Concordance of clone EP1 and the ERα component of the ER/PR pharmDx kit
| ERα component of ER/PR pharmDx | EP1 | # | Per cent |
|---|---|---|---|
| Positive/negative comparison | |||
| Positive | Positive | 183 | 58.3 |
| Positive | Negative | 2 | 0.6 |
| Negative | Positive | 10 | 3.2 |
| Negative | Negative | 119 | 37.9 |
| Agreement | |||
| Positive agreement | 183/185=98.9% | ||
| Negative agreement | 119/129=92.2% | ||
| Overall agreement | 302/314=96.2% | ||
| κ (95% CI) | 0.920 (0.876 to 0.965) | ||
ER, oestrogen receptor.