Abstract
Background
Ulcerative colitis (UC) is the most common form of inflammatory bowel disease in the UK. Medical management aims to induce and maintain remission and to avoid complications and the necessity for surgical intervention. Colectomy removes the source of inflammation but is associated with morbidity and mortality. Newer anti-tumour necrosis factor (TNF)-α therapies may improve medical outcomes, albeit at an increased cost.
Objective
Our objective was to assess the incremental cost effectiveness of infliximab, adalimumab and golimumab versus conventional therapy and surgery from a National Health Service (NHS) and Personal Social Services (PSS) perspective over a lifetime horizon.
Methods
A Markov model was developed with health states defined according to whether the patient is alive or dead, current treatments received, history of colectomy and level of disease control. Transition probabilities were derived from network meta-analyses (NMAs) of trials of anti-TNF-α agents in the moderate-to-severe UC population. Health utilities, colectomy rates, surgical complications and resource use estimates were derived from literature. Unit costs were drawn from standard costing sources and literature and were valued at year 2013/2014 values.
Results
For patients in whom surgery is an option, colectomy is expected to dominate all medical treatment options. For patients in whom colectomy is not an option, infliximab and golimumab are expected to be ruled out due to dominance, whilst the incremental cost-effectiveness ratio (ICER) for adalimumab versus conventional treatment is expected to be approximately £50,278 per quality-adjusted life-year (QALY) gained.
Conclusions
Based on the NMAs, the ICERs for anti-TNF-α therapy versus conventional treatment or surgery are expected to be at best, in excess of £50,000 per QALY gained. The cost effectiveness of withdrawing biologic therapy upon remission and re-treating relapse is unknown.
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Acknowledgments
The authors would like to thank MSD and AbbVie for providing additional data over the course of the National Institute for Health and Care Excellence (NICE) appraisal for which the model was developed.
Author Contributions
Paul Tappenden and Hasan Basarir developed the health economic model. Rachel Archer and Marrissa Martyn-St James undertook the systematic review of clinical effectiveness evidence. Shijie Ren, Rebecca Harvey and John Stevens undertook the network meta-analyses. Sami Hoque and Alan Lobo provided ongoing clinical advice during the model development. All authors contributed to the preparation of this manuscript. Paul Tappenden will act as the overall guarantor for this work.
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This study was funded by the National Institute for Health Research (NIHR) Health Technology Assessment (HTA) Programme to inform the NICE Technology Appraisal Programme (Project Number 12/51/01). Alan Lobo has received money for attending an advisory board for Takeda Pharmaceuticals. Paul Tappenden, Shijie Ren, Rachel Archer, Rebecca Harvey, Marrissa Martyn-St James, Hasan Basarir, John Stevens and Sami Hoque do not have any conflicts of interest to declare.
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Tappenden, P., Ren, S., Archer, R. et al. A Model-Based Economic Evaluation of Biologic and Non-Biologic Options for the Treatment of Adults with Moderately-to-Severely Active Ulcerative Colitis after the Failure of Conventional Therapy. PharmacoEconomics 34, 1023–1038 (2016). https://doi.org/10.1007/s40273-016-0409-9
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DOI: https://doi.org/10.1007/s40273-016-0409-9