English, Article edition: A Bayesian model averaging approach for cost-effectiveness analyses Caterina Conigliani; Andrea Tancredi

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Bookmark: http://trove.nla.gov.au/version/76495
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  • article
Language
  • English

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Title
  • A Bayesian model averaging approach for cost-effectiveness analyses
Author
  • Caterina Conigliani
  • Andrea Tancredi
Physical Description
  • article
Notes
  • We consider the problem of assessing new and existing technologies for their cost-effectiveness in the case where data on both costs and effects are available from a clinical trial, and we address it by means of the cost-effectiveness acceptability curve. The main difficulty in these analyses is that cost data usually exhibit highly skew and heavy-tailed distributions so that it can be extremely difficult to produce realistic probabilistic models for the underlying population distribution, and in particular to model accurately the tail of the distribution, which is highly influential in estimating the population mean. Here, in order to integrate the uncertainty about the model into the analysis of cost data and into cost-effectiveness analyses, we consider an approach based on Bayesian model averaging: instead of choosing a single parametric model, we specify a set of plausible models for costs and estimate the mean cost with a weighted mean of its posterior expectations under each model, with weights given by the posterior model probabilities. The results are compared with those obtained with a semi-parametric approach that does not require any assumption about the distribution of costs. Copyright © 2008 John Wiley &​ Sons, Ltd.
  • RePEc:wly:hlthec:v:18:y:2009:i:7:p:807-821
Language
  • English
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