Socioeconomic status impacts survival and access to resection in pancreatic adenocarcinoma: A high-resolution population-based cancer registry study

Background: Survival of patients with pancreatic adenocarcinoma (PA) is very poor. Resection status is highly associated with prognosis but only 15%-20% are resectable. The aim of this study was to analyse the impact of socioeconomic deprivation on PA survival and to define which management steps are affected. Methods: Between 01/01/2000 and 31/12/2014, 1451 incident cases of PA recorded in the digestive cancer registry of the French department of Calvados were included. The population was divided between less deprived areas (quintile 1) and more deprived areas (quintile 2,3,4,5 aggregated). Results: Patients from less deprived areas were younger at diagnosis than those from more deprived areas (69.9 vs 72.3 years, p = 0.01). There was no difference in stage or comorbidities. Three- and 5-year survival rates were significantly higher for less deprived areas than more deprived areas: 10.5% vs 5.15% and 4.7% vs 1.7% respectively (p = 0.01). In univariate analysis, those living in less deprived areas had a better survival than those in more deprived areas (HR = 0.81 [0.69-0.95], p = 0.009) but not in multivariable analysis (HRa = 0.93 [0.79-1.11], p = 0.383) or analysis stratified on resection. In multivariable regression, less deprived areas had more access to surgery than more deprived areas (ORa = 1.73 [1.08-2.47], p = 0.013). No difference was observed on access to adjuvant chemotherapy (ORa = 0.95 [0.38-2.34], p = 0.681). Conclusion: The key to reducing survival inequalities in PA is access to resection, so future studies should investigate the factors impacting this issue.