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Concordance between local and central ER status (as of December 2009)
| Central Laboratory |
||
|---|---|---|
| Local ER status | Mayo | IEO |
| Local ER positive | ||
| Total cases | 272 | 4899 |
| Positive ≥ 10% | 224 | 4590 |
| Positive ≥ 1% and < 10% | 4 | 101 |
| Negative | 44 (16.2%) | 208 (4.2%) |
| Local ER negative | ||
| Total cases | 147 | 4122 |
| Positive ≥ 10% | 5 (3.4%) | 665 (16.1%) |
| Positive ≥ 1% and < 10% | 0 (0.0%) | 217 (5.3%) |
| Negative | 142 | 3240 |
ER estrogen receptor, Mayo Mayo Clinic central laboratory, IEO European Institute of Oncology central laboratory
