Survival and Predictive Factors of Chemotherapy With FOLFIRINOX as First-Line Therapy in Metastatic Pancreatic Cancer: A Retrospective Multicentric Analysis

Objectives The use of FOLFIRINOX (a combination of oxaliplatin, irinotecan, fluorouracil, and leucovorin) is one of the therapeutic standards in pancreatic adenocarcinoma. We analyzed progression-free survival (PFS) and overall survival (OS) and their predictive factors in patients treated with FOLFIRINOX as first-line therapy in metastatic pancreatic cancer. Methods This multicenter retrospective analysis included patients treated with FOLFIRINOX between 2011 and 2015. The Kaplan-Meier method was used to estimate OS and PFS. The statistical comparison for survival was performed by the log-rank test. Predictive factors were estimated in multivariate analysis with the use of a Cox model. Results One hundred and thirty-six patients were included (74 men, 62 women; median age, 62 years [range, 29-74 years]). The median PFS was 5.97 months (95% confidence interval, 4.4-6.63 months). The median OS was 8.93 months (95% confidence interval, 7.4-10.07 months). Prognostic factors in multivariate analysis were the use of granulocyte colony-stimulating factor, which appeared to be a good prognostic factor. Dose intensity of oxaliplatin (≥74.48%) and dose intensity of bolus of fluorouracil (>6.9%) appeared as pejorative factors. Conclusions In patients with metastatic pancreatic adenocarcinoma treated with FOLFIRINOX in first line, dose modifications at the onset of adverse effects and early use of granulocyte-colony stimulating factor seem to be associated with a better survival.