Comparing Minimally Invasive and Open Pancreaticoduodenectomy for the Treatment of Pancreatic Cancer: a Win Ratio Analysis

Abstract

IntroductionDespite its rising adoption, the use of minimally invasive (MIS) pancreaticoduodenectomy (PD) in the treatment of pancreatic cancer remains controversial. We sought to compare MIS and open PD for pancreatic cancer resection in terms of short-term, long-term, and oncologic outcomes using the win ratio, a novel statistical approach. MethodsPatients undergoing PD for pancreatic adenocarcinoma 2010–2016 were identified from the National Cancer Database (NCDB). Patients were paired based on age, sex, race, tumor size, Charlson-Deyo score, and receipt of neoadjuvant chemotherapy. The win ratio was calculated based on 30-day and 3-year mortality, receipt of adjuvant chemotherapy, surgical margin status, examination of at least 11 lymph nodes, extended length of stay, and 30-day readmission. ResultsAmong 18,936 patients, median age was 67 (IQR: 60–74); most patients had stage II disease at diagnosis (n = 16,530, 87.3%) and tumor size ≥ 2 cm (n = 15,880, 83.9%). The majority of patients underwent open PD (n = 16,409, 86.7%) versus MIS PD (n = 2527, 13.3%). For every matched patient-patient pair, the odds of the patient undergoing MIS PD “winning” were 1.14 (95%CI 1.13–1.15) higher versus open PD. The benefits of MIS PD were most pronounced among patients with tumor size < 2 cm (WR 1.21, 95%CI 1.13–1.30 versus ≥ 2 cm, WR 1.13, 95%CI 1.12–1.14) and patients who received neoadjuvant chemotherapy prior to resection (WR 1.28, 95%CI 1.23–1.32 versus no neoadjuvant chemotherapy, WR 1.13, 95%CI 1.11–1.14). ConclusionsMIS PD may be preferable to open PD based on a hierarchical composite outcome that considered short-term, long-term, and oncologic outcomes.