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Title: Adapting the CHEERS Statement for Reporting Cost-Benefit Analysis Authors: Sabina Sanghera

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Sanghera S, Frew E, Roberts TE (2015). Adapting the CHEERS Statement for Reporting Cost-Benefit Analysis. PharmacoEconomics 33(5): 533-534

The final publication is available at http://link.springer.com/article/10.1007%2Fs40273-015-0265-z

Title: Adapting the CHEERS Statement for Reporting Cost-Benefit Analysis Authors: Sabina Sanghera

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, Emma Frew

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, Tracy Elizabeth Roberts

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Health Economics Unit, University of Birmingham, UK

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Present address: Health Economics Research Group, Brunel University London, UK

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Corresponding author:

Tracy Elizabeth Roberts. [email protected] Dear Editor,

The Consolidated Health Economic Evaluation Reporting Standards (CHEERS) statement was developed to aid consistency and transparency of the reporting of economic evaluations [1]. The CHEERS statement is a 24-item checklist providing recommendations on the minimum amount of information that should be included when reporting economic evaluations. The statement was published in 2013 in a range of journals that commonly publish economic evaluations and is therefore recommended, and in some journals obligatory in the submission process, for use when reporting any design of economic evaluation. It is widely accepted that in order to ensure robust decisions are made and to facilitate clear comparisons across studies, economic evaluations must be reported comprehensively. Therefore the wide-scale implementation of reporting guidance such as the CHEERS statement is required.

The CHEERS statement was developed based on previous reporting checklists and the use of a Delphi panel consisting of 47 participants from a range of backgrounds, including academia. The developers of CHEERS acknowledge that the composition of the panel might have influenced the focus of the statements, and consequently the checklist might be limited in its use for system dynamic models and in its use in both public health and developing countries contexts. It is intended therefore that the reporting guidance be revisited and extended if necessary.

The reporting guidance is designed to be used for any form of economic evaluation. However, our own recent experience of reporting both a cost-benefit analysis and cost-utility analysis suggests there are some limitations in the CHEERS statement when applied to cost-benefit analysis.

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We have recently carried out two economic evaluations addressing the same question. Both economic evaluations were conducted for pharmaceutical treatments of menorrhagia (clinically termed heavy menstrual bleeding). Briefly, two cost-utility analyses—one using the EuroQol (EQ)-5D and the others using the Short-Form 6-Dimension (SF-6D) to estimate quality-adjusted life-years (QALYs)—

were carried out alongside a UK randomised controlled trial [ 2]. The cost-benefit analysis compared the same pharmaceutical treatments for menorrhagia and used a survey to elicit exante willingness-to- pay values as a measure of outcome (Sanghera et al., unpublished data).

As expected, the reporting of the cost-utility analysis using the CHEERS statement was comprehensive and covered all key aspects of the analysis. Each item on the checklist was clearly relevant, and by adhering to the CHEERS checklist both the cost-utility analyses were reported in a manner that can be readily assessed for quality and compared with other cost-utility analyses.

In contrast, the reporting of the cost-benefit analysis using the CHEERS statement identified significant gaps and it was therefore necessary to provide additional information beyond what was outlined in the statement to ensure it was transparent and robustly reported.

A particular limitation of the CHEERS statement for cost-benefit analysis was the method of reporting outcomes. The checklist refers to the reporting of preference related information, but additional specific details such as information on elicitation formats and payment vehicles are required for cost-benefit analysis. Several authors have outlined key criteria that need to be reported when presenting contingent valuation and cost-benefit analyses, but these were not included in the CHEERS checklist [3, 4]. Since there is not one standardised approach recommended for eliciting outcomes for cost-benefit analysis in healthcare, it is important to ensure that the methods chosen to measure values are reported explicitly and unambiguously to enable an assessment of the scientific rigour of the approach. In its current form, this is lacking from the CHEERS statement.

While the conclusion we have reached is based on the reporting of only one cost-benefit analysis, which may not be considered strong evidence to suggest the inadequacy of the CHEERS statement for cost-benefit analysis, it is well recognised that currently very few full cost-benefit analyses exist in the published literature. We are concerned that these types of economic evaluations will not be encouraged if they cannot be seen to be robustly assessed using guidance such as the CHEERS statement—a requirement for published economic evaluations in many journals [1]. There are likely to be similar concerns about the adequacy of CHEERS to encourage explicit reporting of alternative measures of outcome such as those arising from discrete-choice experiments, in relation to attribute and level selection, statistical analyses and model estimations.

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The CHEERS statement is designed to be ‘‘neutral about the conduct of economic evaluation, allowing analysts the freedom to choose different methods,’’ but our experience of using the statement suggests that it is comprehensive for economic evaluations in the form of cost-utility/ cost- effectiveness analysis, but not for cost-benefit analysis. This may be an inevitable finding given historical trends within economic evaluation with a focus on cost-utility/ effectiveness. However, as decision makers now suggest the use of cost-benefit analysis to assess wider perspectives in public health interventions there is a need to adapt reporting guidelines to ensure they are inclusive of this approach. Currently, there needs to be more flexibility in the guidelines for this to be accomplished.

The CHEERS statement needs to be reviewed, evaluated and extended to ensure it is fit for purpose for adding clarity to all economic evaluations.

Yours sincerely

Tracy Roberts, Sabina Sanghera and Emma Frew

Conflict of interest:

The authors have no conflicts of interest that are directly related to this letter.

References

1. Husereau D, Drummond M, Petrou S, et al. Consolidated health economic evaluation reporting standards (CHEERS) statement. Pharmacoeconomics. 2013;31:361–7.

2. Sanghera S, Roberts T, Barton P, et al. LNG-IUS vs. usual medical treatment for menorrhagia: an economic evaluation alongside a randomised controlled trial. PLoS One. 2014;9(3):e91891.

doi:10.1371/journal.pone.0091891.

3. McIntosh E, Clarke PM, Frew EJ, et al. Applied methods of cost-benefit analysis in health care.

Oxford: Oxford University Press; 2010.

4. Smith RD. Construction of the contingent valuation market in healthcare: a critical assessment.

Health Econ. 2003;12:09–628

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