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Canadian Journal of Gastroenterology
Volume 24, Issue 8, Pages 489-498
http://dx.doi.org/10.1155/2010/379583
Original Article

A One-Year Economic Evaluation of Six Alternative Strategies for the Management of Uninvestigated Upper Gastrointestinal Symptoms in Canadian Primary Care

Alan N Barkun,1,2 Ralph Crott,3 Carlo A Fallone,1 Wendy A Kennedy,4 Jean Lachaine,4 Carey Levinton,1 David Armstrong,5 Naoki Chiba,5,6 Alan Thomson,7 Sander Veldhuyzen van Zanten,8 Paul Sinclair,9 Sergio Escobedo,10 Bijan Chakraborty,10 Sandra Smyth,10 Robert White,10 Helen Kalra,10 and Krista Nevin10

1Division of Gastroenterology, McGill University, Montréal, Quebec, Canada
2Division of Clinical Epidemiology, McGill University, Montréal, Quebec, Canada
3Cliniques Universitaires St-Luc, Catholic University of Louvain, Brussels, Belgium
4Faculty of Pharmacy, Université de Montréal, Montréal, Quebec, Canada
5Division of Gastroenterology, McMaster University, Hamilton, Canada
6Surrey GI Research Inc, Guelph, Ontario, Canada
7University of Alberta, Edmonton, Alberta, Canada
8Dalhousie University, Halifax, Nova Scotia, Canada
9INSINConsulting, Guelph, Canada
10AstraZeneca Canada Inc, Mississauga, Ontario, Canada

Received 22 December 2009

Copyright © 2010 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

BACKGROUND: The cost-effectiveness of initial strategies in managing Canadian patients with uninvestigated upper gastrointestinal symptoms remains controversial.

OBJECTIVE: To assess the cost-effectiveness of six management approaches to uninvestigated upper gastrointestinal symptoms in the Canadian setting.

METHODS: The present study analyzed data from four randomized trials assessing homogeneous and complementary populations of Canadian patients with uninvestigated upper gastrointestinal symptoms with comparable outcomes. Symptom-free months, quality-adjusted life-years (QALYs) and direct costs in Canadian dollars of two management approaches based on the Canadian Dyspepsia Working Group (CanDys) Clinical Management Tool, and four additional strategies (two empirical antisecretory agents, and two prompt endoscopy) were examined and compared. Prevalence data, probabilities, utilities and costs were included in a Markov model, while sensitivity analysis used Monte Carlo simulations. Incremental cost-effectiveness ratios and cost-effectiveness acceptability curves were determined.

RESULTS: Empirical omeprazole cost $226 per QALY ($49 per symptom-free month) per patient. CanDys omeprazole and endoscopy approaches were more effective than empirical omeprazole, but more costly. Alternatives using H2-receptor antagonists were less effective than those using a proton pump inhibitor. No significant differences were found for most incremental cost-effectiveness ratios. As willingness to pay (WTP) thresholds rose from $226 to $24,000 per QALY, empirical antisecretory approaches were less likely to be the most cost-effective choice, with CanDys omeprazole progressively becoming a more likely option. For WTP values ranging from $24,000 to $70,000 per QALY, the most clinically relevant range, CanDys omeprazole was the most cost-effective strategy (32% to 46% of the time), with prompt endoscopy-proton pump inhibitor favoured at higher WTP values.

CONCLUSIONS: Although no strategy was the indisputable cost-effective option, CanDys omeprazole may be the strategy of choice over a clinically relevant range of WTP assumptions in the initial management of Canadian patients with uninvestigated dyspepsia.