George Washington University School of Medicine, Washington, DC
Kanika G. Nair , Suneel Deepak Kamath , Wei Wei , Katherine Tullio , Bassam N. Estfan , Alok A. Khorana
Background: The median age of diagnosis of pancreatic ductal adenocarcinomas (PDAC) is 70 years. Only about 20% of patients are diagnosed prior to the age of 60. We sought to identify clinical characteristics and outcomes of patients with early-onset PDAC as compared to later-onset PDAC. Methods: We identified histologically confirmed cases of pancreatic adenocarcinoma with information about age and overall survival (OS) diagnosed between 2004 and 2016 from the National Cancer Database (NCDB). Differences in demographic, disease and treatment characteristics and socioeconomic factors between younger and older patients were assessed by Chi-square test. The effect of age, race, insurance status, community median income and community educational attainment on overall survival (OS) were assessed using log rank test. Results: Of 321,896 patients who met inclusion criteria, 71,263 (22%) were younger than 60 years and 250,633 were 60 years of age or older at diagnosis. Median OS for younger patients was 9.5 months, compared to 5.6 months for older patients (p< 0.0001). Younger patients were more likely to be diagnosed with stage IV disease (47.8% vs 43.4%), to be Black (16.1% vs 10.7%) or Hispanic (6.4% vs 4.5%), have a Charlson-Deyo comorbidity index of 0 (73.5% vs 63.3%), have private insurance (65.1% vs 20.5%), and receive treatment at academic centers (45.9% vs 40.9) (all p< 0.0001). Younger patients were also more likely to receive surgery (26.2% vs 19.5%), radiation (23.0% vs 15.9%), and chemotherapy (65.9% vs 46.7%) (all p< 0.0001). Conclusions: Survival for patients with early-onset PDAC is significantly better than older patients despite more patients being diagnosed with stage IV disease. This may be attributable to younger patients having less comorbidities and receiving more treatment. Concerningly, Black and Hispanic patients make up a larger proportion of younger patients with PDAC, and further work is needed to investigate these differences and underlying causes.
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