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Platinum chemotherapy has a role in the treatment of metastatic triple-negative breast cancer but its full potential has probably not yet been reached. We assessed whether a cisplatin plus gemcitabine regimen was non-inferior to or superior to paclitaxel plus gemcitabine as first-line therapy for patients with metastatic triple-negative breast cancer.

For this open-label, randomised, phase 3, hybrid-designed trial undertaken at 12 institutions or hospitals in China, we included Chinese patients aged 18–70 years with previously untreated, histologically confirmed metastatic triple-negative breast cancer, and an ECOG performance status of 0–1. These patients were randomly assigned (1:1) to receive either cisplatin plus gemcitabine (cisplatin 75 mg/m² on day 1 and gemcitabine 1250 mg/m² on days 1 and 8) or paclitaxel plus gemcitabine (paclitaxel 175 mg/m² on day 1 and gemcitabine 1250 mg/m² …