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Hazard Ratio for the Development of Invasive ER-Positive and ER-Negative Breast Cancer After RRSO
| Technique | No. of Patients | ER-Positive Invasive Breast Cancer | ER-Negative Invasive Breast Cancer | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Events | Hazard Ratio | 95% CI | P | Events | Hazard Ratio | 95% CI | P | ||
| RRSO | 300 | 2 | 0.22 | 0.05 to 1.05 | .058 | 14 | 1.10 | 0.48 to 2.51 | .85 |
| Surveillance | 284 | 7 | 1.0 | Referent | 11 | 1.0 | Referent | ||
Abbreviations: ER, estrogen receptor; RRSO, risk-reducing salpingo-oophorectomy.
