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Groen, J. V., Sibinga Mulder, B. G., Eycken, E. van, Valerianova, Z., Borras, J. M., Geest, L. G. M. van der, Capretti, G., Schlesinger-Raab, Anne, Primic-Zakelj, M., Ryzhov, A., Velde, C. J. H. van de, Bonsing, B. A., Bastiaannet, E. and Mieog, J. S. D. (2018): Differences in Treatment and Outcome of Pancreatic Adenocarcinoma Stage I and II in the EURECCA Pancreas Consortium. In: Annals of Surgical Oncology: pp. 1-10

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BACKGROUND The EUropean REgistration of Cancer CAre (EURECCA) consortium aims to investigate differences in treatment and to improve cancer care through Europe. The purpose of this study was to compare neo- and adjuvant chemotherapy (ACT) and outcome after tumor resection for pancreatic adenocarcinoma stage I and II in the EURECCA Pancreas consortium. METHODS The eight, collaborating national, regional, and single-center partners shared their anonymized dataset. Patients diagnosed in 2012-2013 who underwent tumor resection for pancreatic adenocarcinoma stage I and II were investigated with respect to treatment and survival and compared using uni- and multivariable logistic and Cox regression analyses. All comparisons were performed separately per registry type: national, regional, and single-center registries. RESULTS In total, 2052 patients were included. Stage II was present in the majority of patients. The use of neo-ACT was limited in most registries (range 2.8-15.5%) and was only different between Belgium and The Netherlands after adjustment for potential confounders. The use of ACT was different between the registries (range 40.5-70.0%), even after adjustment for potential confounders. Ninety-day mortality was also different between the registries (range 0.9-13.6%). In multivariable analyses for overall survival, differences were observed between the national and regional registries. Furthermore, patients in ascending age groups and patients with stage II showed a significant worse overall survival. CONCLUSIONS This study provides a clear insight in clinical practice in the EURECCA Pancreas consortium. The differences observed in (neo-)ACT and outcome give us the chance to further investigate the best practices and improve outcome of pancreatic adenocarcinoma.

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