Evidence for the Positive Impact of Centralization in Esophageal Cancer Surgery.

ABSTRACT

OBJECTIVE: In this study we analyzed the impact of centralization on key metrics, outcomes and patterns of care at the Irish National Center. SUMMARY BACKGROUND DATA Overall survival rates in esophageal cancer in the West have doubled in the last 25 years. An international trend towards centralization may be relevant, however this model remains controversial with Ireland, centralizing esophageal cancer surgery in 2011. STUDY DESIGN: All patients (n=1245) with adenocarcinoma of the esophagus or junction treated with curative intent involving surgery, including endoscopic surgery, were included (n= 461 from 2000-2011, and 784 from 2012-2022). All data entry was prospectively recorded. Overall survival was measured (i) for the entire cohort; (ii) patients with locally advanced disease (cT2-3N0-3); and (iii) patients undergoing neoadjuvant therapy. All complications were recorded as per Esophageal Complication Consensus Group (ECCG) definitions, and the Clavien Dindo (CD) severity classification. STATISTICAL ANALYSIS: Data were analyzed using GraphPad Prism (v.6.0) for Windows and SPSS (v.23.0) software (SPSS,Chicago,IL) RStudio (Rversion4.2.2). Survival times were calculated using log-rank test and a Cox-regression analysis, and Kaplan-Meier curves generated. RESULTS: Endotherapy for cT1a/IMC adenocarcinoma increased from 40 (9% total) to 245 (31% total) procedures between the pre-centralization (pre-C) and post-centralization (post-C) periods. A significantly (P<0.001) higher proportion of patients with cT2-3N0-3 disease in the post-C period underwent neoadjuvant therapy (66% vs 53%). Operative mortality was lower (P=0.02) post-C, at 2% vs 4.5%, and>IIIa CD major complications decreased from 33% to 25% (P<0.01). Recurrence rates were lower post-C (38% vs 53%, P<0.01). Median overall survival was 73.83 versus 47.23 months in the 2012-22 and 2000-11 cohorts respectively (P<0.001). For those who received neoadjuvant therapy, the median survival was 28.5 months pre-C and 42.5 months post-C (P<0.001). CONCLUSION: These data highlight improvements in both operative outcomes and survival from the time of centralization, and a major expansion of endoscopic surgery. Although not providing proof, the study suggests a positive impact of formal centralization with governance on key quality metrics, and an evolution in patterns of care.