Three drugs vs two drugs first-line chemotherapy regimen in advanced gastric cancer patients: a retrospective analysis

The definition of the standard chemotherapy regimen for advanced gastric cancer is still a matter of debate. Aim of our analysis was to retrospectively assess whether an intensive, three-drugs, front line approach could be comparable to a sequential (two-drugs front line then second line) in terms of RR (response rate), PFS (progression free survival) and OS (overall survival) in advanced gastric cancer patients in the clinical practice. Patients with metastatic gastric cancer who have received a first-line combination chemotherapy with a two or three-drugs regimen were included in our analysis. We divided our patients into two groups, A and B, based on the first line chemotherapy administered (group A = three drugs; group B = two drugs). A total of 425 patients were eligible for our analysis. 216 patients (50.8 %) received three chemotherapeutic agents (group A) and 209 patients (49.2 %) received a two drugs regimen as first-line combination chemotherapy (group B). RR for group A and B was 44 and 29.6 %, respectively (p = 0.0005), median PFS was 7.3 months in group A and 4.5 months in group B (p = 0.0007). No significant difference was found in terms of OS. The addition of a third drug to a doublet chemotherapy regimen appeared more active in terms of response rate and PFS. However median OS resulted comparable. On this basis, the use of a sequential approach may represent a reasonable strategy for patients unwilling or unable to undergo a more intensive treatment without compromising OS.

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