Cost effectiveness after a pancreaticoduodenectomy: bolstering the volume argument

BackgroundThe cost implication of variability in pancreatic surgery is not well described. It was hypothesized that for a pancreaticoduodenectomy (PD), lower volume centres demonstrate worse peri-operative outcomes at higher costs. MethodsFrom 2009-2011, 9883 patients undergoing a PD were identified from the University HealthSystems Consortium (UHC) database and stratified into quintiles by annual hospital case volume. A decision analytic model was constructed to assess cost effectiveness. Total direct cost data were based on Medicare cost/charge ratios and included readmission costs when applicable. ResultsThe lowest volume centres demonstrated a higher peri-operative mortality rate (3.5% versus 1.3%, P < 0.001) compared with the highest volume centres. When both index and readmission costs were considered, the per-patient total direct cost at the lowest volume centres was $23005, or 10.9% (i.e. $2263 per case) more than at the highest volume centres. One-way sensitivity analyses adjusting for peri-operative mortality (1.3% at all centres) did not materially change the cost effectiveness analysis. Differences in cost were largely recognized in the index admission; readmission costs were similar across quintiles. ConclusionsFor PD, low volume centres have higher peri-operative mortality rates and 10.9% higher cost per patient. Performance of PD at higher volume centres can lead to both better outcomes and substantial cost savings.