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Predicting Survival in cost-effectiveness analyses based on clinical trials

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  • Gerdtham, Ulf-G

    () (Dept. of Economics, Stockholm School of Economics)

  • Zethraeus, Niklas

    () (Dept. of Economics, Stockholm School of Economics)

Abstract

This paper deals with the question how to model health effects after the cessation of a randomised controlled trial (RCT). Using clinical trial data on severe congestive heart failure patients we illustrate how survival beyond the cessation of a RCT can be predicted based on parametric survival models. In the analysis we compare the predicted survival and the resulting incremental cost-effectiveness ratio (ICER) of different survival models with the actual survival/ICER. Our main finding is that the results are highly sensitive to the choice of survival model and that extensive sensitivity analysis in the CE analysis is required. We also show that adding the true survival after the end of the clinical study will underestimate the true variability.

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Bibliographic Info

Paper provided by Stockholm School of Economics in its series Working Paper Series in Economics and Finance with number 0442.

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Length: 22 pages
Date of creation: 08 May 2001
Date of revision:
Handle: RePEc:hhs:hastef:0442

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Keywords: cost-effectiveness analysis; modelling; confidence intervals;

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