High-volume versus low-volume for esophageal resections for cancer: the essential role of case-mix adjustments based on clinical data.

Ann Surg Oncol · 2008 · PMC2190337 · PMID 18004627

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highly significantno p-value reported

Even after risk adjustment, which decreased the outcome differences between high- and low-volume hospitals, the differences in results for esophageal and pancreatic resections were highly significant, favoring surgery in a high-volume center.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.