Abstract
Objective
To review and assess the quality of the available evidence on the cost-effectiveness of erlotinib in the first-line treatment of advanced non-small cell lung cancer (NSCLC).
Methods
A systematic review was conducted to identify full-text original economic evaluations of erlotinib in the first-line treatment of advanced NSCLC written in English and published from the year 2000 onwards. Study characteristics and results were recorded and compared. The quality of the studies was assessed by the Quality of Health Economic Studies (QHES) questionnaire.
Results
Eleven out of 130 papers were chosen for this review. Comparative regimens consisted of a best supportive care, reverse strategy, bevacizumab, cisplatin plus pemetrexed, carboplatin plus gemcitabine or gefitinib. The methods most used in these studies were modeling and sensitivity analysis and cost-effectiveness analysis. All of the studies evaluated direct costs and used quality-adjusted life-year (QALY) and life-years gained (LYG) as outcome, with 3% and 3.5% discount rate. The studies assigned ICER that ranged from dominant to I$305,510.31/QALY and from I$31,209.55/LYG to I$66,540.20/LYG. Based on the willingness to pay threshold, seven studies concluded that erlotinib was cost-effective, two studies showed that erlotinib was cost-effective on specific patients with certain conditions, and two studies comparing erlotinib with reverse strategy did not find a difference in cost-effectiveness. The high quality of these studies was confirmed using the QHES tool: the mean score was 75.77 out of 100 (SD 9.38).
Conclusion
Most of these high-quality studies suggested that erlotinib was cost-effective in the first-line treatment of advanced NSCLC.
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CTTN: study rationale and design, literature search, literature selection, quality assessment of studies, interpretation and reflection, writing of the manuscript. FP: literature search, literature selection, quality assessment of studies, revising and reviewing of the manuscript. SS: literature selection, interpretation and reflection, revising and reviewing of the manuscript. BTN: study rationale and design, revising and reviewing the manuscript. IG: quality assessment of studies, interpretation and reflection, providing critical comments, revising and reviewing the manuscript.
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Appendix 1
Appendix 1
Location—published year—author | Europe—2016—Vergnenegre [32] | USA—2015—Ting [42] | UK—2015—Khan [33] | Germany—2015—Schremser [34] | Hong Kong—2014—Lee [39] | China—2013—Wang [40] | Europe—2012—Walleser [38] | France—2013—Chouaid [36] | France—2012—Chouaid [43] | Europe—2012—Vergnenègre [37] | China—2017—Fangbing [41] |
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QHES question (y = full score, p = partial score, n = zero score) | |||||||||||
1. Was the study objective presented in a clear, specific, and measurable manner? | y | y | y | y | y | y | y | y | y | y | y |
2. Were the perspective of the analysis (societal, third-party payer, etc.) and reasons for its selection stated? | p | n | n | p | p | y | y | p | p | p | n |
3. Were variable estimates used in the analysis from the best available source (i.e., randomized control trial - best, expert opinion - worst)? | y | y | y | y | y | p | p | y | y | y | y |
4. If estimates came from a subgroup analysis, were the groups prespecified at the beginning of the study? | y | y | y | y | y | y | y | y | y | y | y |
5. Was uncertainty handled by (1) statistical analysis to address random events, (2) sensitivity analysis to cover a range of assumptions? | y | y | y | y | y | y | y | y | y | n | y |
6. Was incremental analysis performed between alternatives for resources and costs? | y | y | y | y | y | y | y | y | y | y | y |
7. Was the methodology for data abstraction (including the value of health states and other benefits) stated? | p | p | y | y | p | y | p | p | p | n | y |
8. Did the analytic horizon allow time for all relevant and important outcomes? Were benefits and costs that went beyond 1 year discounted (3–5%) and justification given for the discount rate? | y | y | y | y | y | y | y | n | n | y | n |
9. Was the measurement of costs appropriate and the methodology for the estimation of quantities and unit costs clearly described? | y | y | y | y | p | y | n | y | y | y | y |
10. Were the primary outcome measure(s) for the economic evaluation clearly stated and did they include the major short-term? was justification given for the measures/scales used? | y | p | y | y | p | n | y | p | p | n | y |
11. Were the health outcomes measures/scales valid and reliable? If previously tested valid and reliable measures were not available, was justification given for the measures/scales used? | p | p | y | y | y | n | y | y | y | y | n |
12. Were the economic model (including structure), study methods and analysis, and the components of the numerator and denominator displayed in a clear, transparent manner? | y | y | p | y | p | y | p | n | n | y | y |
13. Were the choice of economic model, main assumptions, and limitations of the study stated and justified? | y | y | y | y | y | y | p | n | n | n | y |
14. Did the author(s) explicitly discuss direction and magnitude of potential biases? | n | n | n | n | n | n | n | n | n | n | n |
15. Were the conclusions/recommendations of the study justified and based on the study results? | y | y | y | y | y | y | y | y | y | y | y |
16. Was there a statement disclosing the source of funding for the study? | n | y | y | y | y | y | n | y | y | y | n |
Total score | 83 | 81 | 86 | 92 | 79 | 77 | 69 | 64.5 | 64.5 | 65 | 73 |
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Nguyen, C.T.T., Petrelli, F., Scuri, S. et al. A systematic review of pharmacoeconomic evaluations of erlotinib in the first-line treatment of advanced non-small cell lung cancer. Eur J Health Econ 20, 763–777 (2019). https://doi.org/10.1007/s10198-019-01040-7
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DOI: https://doi.org/10.1007/s10198-019-01040-7