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BACKGROUND: Early-phase clinical trials are critical to the advancement of cancer care, especially in patients with pancreatic ductal adenocarcinoma, given its aggressive nature and limited available therapeutic options. METHODS: A retrospective chart review of all patients with refractory or metastatic pancreatic ductal adenocarcinoma, referred to the Sarah Cannon Research Institute at HealthONE between 2014 and 2019, were reviewed. Patients who completed genomic profiling and qualified for a phase 1 trial (primarily 1a but some 1b) were identified to assess barriers to trial enrollment. RESULTS: Of 74 identified patients, 54 patients (73%) qualified for at least 1 clinical trial based on eligibility criteria and alterations detected via molecular profiling. Up to 40 industry-sponsored clinical trials were available during this time for consideration. Of the 54, 28 patients (52%) enrolled in a clinical trial, while 26 (48%) did not enroll. The most frequently cited barriers to enrollment were concerns regarding time commitment (12%), prolonged wait time for enrollment (12%), and fear of adverse events (8%). Seven of the 26 patients (27%) were lost to follow-up or had no stated reason for declining enrollment; others did not go on trial due to death/transition to hospice (n = 5; 19%) or progression of disease/declining functional status (n=4; 15%). There were few statistically significant differences between patients who chose to go on trial and those who declined. CONCLUSIONS: An understanding of why eligible patients elect not to participate in early-phase clinical trials provides insight into the patient experience and can help identify misperceptions and areas for improvement in education and the clinical trial enrollment process. KEYWORDS: cancer clinical trials, early-phase clinical trial, clinical trial barriers, pancreatic ductal adenocarcinoma, pancreatic cancer trials, Introduction Pancreatic ductal adenocarcinoma (PDAC) is an aggressive malignancy with limited effective therapeutic options available. Surgical resection remains first-line treatment, but most patients are not candidates due to advanced stage [...]