Patients with stage invasive breast cancer who were scheduled to receive at least 2 cycles of adjuvant or neoadjuvant chemotherapy with TAC/TC/TCbH regimen were eligible for this multicenter, open-label, randomized trial. Patients were randomized (2:1) to receive QL0605 24 hours (24h group) or 48 hours (48h group) after the end of each cycle of chemotherapy. The primary endpoint was the incidence rate of FN for cycle 1. The secondary endpoints included the incidence rates of grade 3/4 neutropenia, chemotherapy dose reduction and chemotherapy delay due to neutropenia, antibiotic administration, the pain (bone, muscle, or joint), ect.
