5-FU on days 1-5) every 21 days, whereas 54 patients received mFOLFOX-6 (85 mg/m 2 oxaliplatin and 400 mg/m 2 LV as a 2-h infusion, followed by a 5-FU bolus of 400 mg/m 2 and 2,400 mg/m 2 5-FU as a 46-h continuous infusion) every 14 days. In the DCF arm, 55 (76.4%) of the patients received prophylactic granulocyte colony-stimulating factor (G-CSF), 48-72 h following completion of chemotherapy. The median follow-up of the study was 12.1 months. The overall response rate (ORR) was 37.0% for mFOLFOX-6 and 40.3% for DCF (P= 0.72). The median time to progression was 6.5 and 6.2 months in the mFOLFOX-6 and DCF arms, respectively (P= 0.70). The median overall survival was 11.4 and 13.5 months in the mFOLFOX-6 and DCF arms, respectively (P= 0.72). The rates of hematological toxicity did not differ between the two arms. However, in the subgroup analysis, grade 3-4 neutropenia and febrile neutropenia were significantly more common among patients who had not received G-CSF prophylaxis in the DCF arm. The incidence of grade 3-4 nausea/vomiting and diarrhea were significantly higher in the DCF arm. In conclusion, the present study demonstrated that the efficacy of the mFOLFOX-6 regimen was comparable to that of the DCF regimen in AGC patients. In addition, the benefit of G-CSF prophylaxis in conjunction with the DCF regimen was demonstrated.