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PIK3CA Genotyping Results by ER Status and Treatment Arm
| Patient Group | Total No. of Patients |
PIK3CA Mutant |
|
|---|---|---|---|
| No. of Patients | % | ||
| ER status | |||
| Negative | 186 | 41 | 22.0 |
| Positive | 169 | 39 | 23.1 |
| Treatment arm | |||
| Lapatinib | 124 | 29 | 23.4 |
| Trastuzumab | 112 | 21 | 18.8 |
| Lapatinib + trastuzumab | 119 | 30 | 25.2 |
Abbreviation: ER, estrogen receptor.
