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R and Shiny for Cost-Effectiveness Analyses: Why and When? A Hypothetical Case Study

Abstract

Introduction

Health economics models are typically built in Microsoft Excel® owing to its wide familiarity, accessibility and perceived transparency. However, given the increasingly rapid and analytically complex decision-making needs of both the pharmaceutical industry and the field of health economics and outcomes research (HEOR), the demands of cost-effectiveness analyses may be better met by the programming language R.

Objective

This case study provides an explicit comparison between Excel and R for contemporary cost-effectiveness analysis.

Methods

We constructed duplicate cost-effectiveness models using Excel and R (with a user interface built using the Shiny package) to address a hypothetical case study typical of contemporary health technology assessment.

Results

We compared R and Excel versions of the same model design to determine the advantages and limitations of the modelling platforms in terms of (i) analytical capability, (ii) data safety, (iii) building considerations, (iv) usability for technical and non-technical users and (v) model adaptability.

Conclusions

The findings of this explicit comparison are used to produce recommendations for when R might be more suitable than Excel in contemporary cost-effectiveness analyses. We conclude that selection of appropriate modelling software needs to consider case-by-case modelling requirements, particularly (i) intended audience, (ii) complexity of analysis, (iii) nature and frequency of updates and (iv) anticipated model run time.

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Data Availability Statement

The datasets generated and analysed during the current study are available from the corresponding author on reasonable request. The Microsoft Excel® model presented in this publication is included in the supplementary material files. The R code for the intRface model produced for this study is not publicly available due to commercial interest, but is available from the corresponding author on reasonable request. A demonstration version of the front-end of the model can be found at https://bresmed-intrface-hypothetical-car-t-model.shinyapps.io/IntRface_Model-PharmacoEconomics/.

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Funding

No external funding was received for the development of the model or manuscript.

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Authors and Affiliations

Authors

Contributions

RH, WS, DG, ND and DL were involved in the conception, planning and writing of this manuscript. RH, DB and ND programmed the model demonstrated within this manuscript. OS, IS and TC were involved in programming methods and functions adapted for use within the model. SR, BR and DL were involved in quality control and validation of the methods used in the model demonstrated within this manuscript. All authors edited and commented on draft versions of the manuscript and approved the submitted versions.

Corresponding author

Correspondence to Rose Hart.

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Conflict of interest

Rose Hart, Darren Burns, Bram Ramaekers, Shijie Ren, Daniel Gladwell, Will Sullivan, Niall Davison, Owain Saunders, Indeg Sly, Theresa Cain and Dawn Lee declare they have no conflicts of interest relevant to the content of this manuscript.

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Hart, R., Burns, D., Ramaekers, B. et al. R and Shiny for Cost-Effectiveness Analyses: Why and When? A Hypothetical Case Study. PharmacoEconomics 38, 765–776 (2020). https://doi.org/10.1007/s40273-020-00903-9

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