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Gastroenterology. 2013 Jan;144(1):62-73.e6. doi: 10.1053/j.gastro.2012.09.060. Epub 2012 Oct 3.

Health benefits and cost effectiveness of endoscopic and nonendoscopic cytosponge screening for Barrett's esophagus.

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  • 1Medical Research Council, Biostatistics Unit, Cambridge, United Kingdom.

Abstract

BACKGROUND & AIMS:

We developed a model to compare the health benefits and cost effectiveness of screening for Barrett's esophagus by either Cytosponge™ or by conventional endoscopy vs no screening, and to estimate their abilities to reduce mortality from esophageal adenocarcinoma.

METHODS:

We used microsimulation modeling of a hypothetical cohort of 50-year-old men in the United Kingdom with histories of gastroesophageal reflux disease symptoms, assuming the prevalence of Barrett's esophagus to be 8%. Participants were invited to undergo screening by endoscopy or Cytosponge (invitation acceptance rates of 23% and 45%, respectively), and outcomes were compared with those from men who underwent no screening. We estimated the number of incident esophageal adenocarcinoma cases prevented and the incremental cost-effectiveness ratio of quality-adjusted life years (QALYs) of the different strategies. Patients found to have high-grade dysplasia or intramucosal cancer received endotherapy. Model inputs included data on disease progression, test accuracy, post-treatment status, and surveillance protocols. Costs and benefits were discounted at 3.5% per year. Supplementary and sensitivity analyses comprised esophagectomy management of high-grade dysplasia or intramucosal cancer, screening by ultrathin nasal endoscopy, and different assumptions of uptake of screening invitations for either strategy.

RESULTS:

We estimated that compared with no screening, Cytosponge screening followed by treatment of patients with dysplasia or intramucosal cancer costs an additional $240 (95% credible interval, $196-$320) per screening participant and results in a mean gain of 0.015 (95% credible interval, -0.001 to 0.029) QALYs and an incremental cost-effectiveness ratio of $15.7 thousand (K) per QALY. The respective values for endoscopy were $299 ($261-$367), 0.013 (0.003-0.023) QALYs, and $22.2K. Screening by the Cytosponge followed by treatment of patients with dysplasia or intramucosal cancer would reduce the number of cases of incident symptomatic esophageal adenocarcinoma by 19%, compared with 17% for screening by endoscopy, although this greater benefit for Cytosponge depends on more patients accepting screening by Cytosponge compared with screening by endoscopy.

CONCLUSIONS:

In a microsimulation model, screening 50-year-old men with symptoms of gastroesophageal reflux disease by Cytosponge is cost effective and would reduce mortality from esophageal adenocarcinoma compared with no screening.

Copyright © 2013 AGA Institute. Published by Elsevier Inc. All rights reserved.

PMID:
23041329
[PubMed - indexed for MEDLINE]
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