Study study type PathologyT1T0Patientssample sizesROB Results

la/mBC - HR-positive - 2nd line (L2) breast cancer - HR positive la/mBC - HR positive la/mBC - HR-positive - 2nd line (L2)

versus placebo
metformin
Pimentel, 2019
  NCT01310231
RCTla/mBC - HR-positive - 2nd line (L2)metformin plus chemotherapyplacebo plus chemotherapyWomen with metastatic or unresectable locally advanced BC, about to receive 1st to 4th line, any HR or HER2 status22 / 18NA
inconclusive
  • inconclusive 20 % increase in progression or deaths (PFS) (PE)
These results do not support the use of metformin with chemotherapy in non-diabetic MBC patients.