Abstract
Background
Pharmaceuticals are usually granted a marketing authorisation on the basis of randomised controlled trials (RCTs). Occasionally the efficacy of a treatment is assessed without a randomised comparator group (either active or placebo).
Objective
To identify and develop a taxonomic account of economic modelling approaches for pharmaceuticals licensed without RCT data.
Methods
We searched PubMed, the websites of UK health technology assessment bodies and the International Society for Pharmacoeconomics and Outcomes Research Scientific Presentations Database for assessments of treatments granted a marketing authorisation by the US Food and Drug Administration or European Medicines Agency from January 1999 to May 2014 without RCT data (74 indications). The outcome of interest was the approach to modelling efficacy data.
Results
Fifty-one unique models were identified in 29 peer-reviewed articles, 30 health technology appraisals, and 15 International Society for Pharmacoeconomics and Outcomes Research abstracts concerning 30 indications (44 indications had not been modelled). We noted the high rate of non-submission to health technology assessment agencies (28/98). The majority of models (43/51) were based on ‘historical controls’—comparisons to previous meta-analysis or pooling of trials (5), individual trials (16), registries/case series (15), or expert opinion (7). Other approaches used the patient as their own control, performed threshold analysis, assumed time on treatment was added to overall survival, or performed cost-minimisation analysis.
Conclusions
There is considerable variation in the quality and approach of models constructed for drugs granted a marketing authorisation without a RCT. The most common approach is of a naive comparison to historical data (using other trials/registry data as a control group), which has considerable scope for bias.
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The study was designed by AJH, GB and NF, the literature searches were conducted by AJH, and interpretation was provided by AJH, GB and NF. All authors read and approved the final manuscript.
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AJH, GB and NF have no conflicts of interest directly relevant to the content of this article.
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Hatswell, A.J., Freemantle, N. & Baio, G. Economic Evaluations of Pharmaceuticals Granted a Marketing Authorisation Without the Results of Randomised Trials: A Systematic Review and Taxonomy. PharmacoEconomics 35, 163–176 (2017). https://doi.org/10.1007/s40273-016-0460-6
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DOI: https://doi.org/10.1007/s40273-016-0460-6