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Concordance between CNB and surgical specimen for ER and PR status.
| Surgical specimen | |||||
| Biopsy | Negative/low | Positive/high | Concordance rate, % | Kappa | P value |
| ER status | |||||
| Negative | 30 | 1 | 98.9 | 0.975 | P < .001 |
| Positive | 0 | 63 | |||
| PR status | |||||
| Negative | 46 | 6 | 92.6 | 0.851 | P < .001 |
| Positive | 1 | 41 | |||
CNB = core needle biopsy, ER = estrogen receptor, PR = progesterone receptor.
