Determinants Of First-Line Treatment Selection In Advanced Pancreatic Ductal Adenocarcinoma (Pdac).

468Background: Chemotherapy options currently available for the first-line treatment of advanced PDAC include FOLFIRINOX (FX), gemcitabine with nab-paclitaxel (GP) and single agent gemcitabine (Gem). GP was introduced most recently and funded for clinical use in British Columbia (BC) in September 2014. In this retrospective analysis, we explore the impact of GP availability on first-line treatment selection and overall survival (OS) in advanced PDAC. Methods: The BC Cancer Agency provincial pharmacy database was used to identify patients (pts) who started FX, GP or Gem between January and August 2014 (pre-GP) or January and August 2015 (post-GP). Pts were eligible for inclusion if they received at least one cycle of first-line therapy for locally advanced or metastatic PDAC. Clinical data were extracted from electronic medical records. OS was defined as time from diagnosis of advanced PDAC to death and compared by treatment era, adjusting for age, ECOG, comorbidities, disease extent and baseline CA19-9. R...