Abstract
Background
Health technology assessment has been increasingly used in China, having been legally mandated in 2019, to inform reimbursement decisions and price negotiations between the National Healthcare Security Administration and pharmaceutical companies around the price of new pharmaceuticals. The criteria currently used to judge cost effectiveness and inform pricing negotiations, 3 × GDP per capita, is based on the rule of thumb previously recommended by the World Health Organization rather than an estimate based on an empirical assessment of health opportunity costs.
Objective
The objective of this study was to inform a cost-effectiveness threshold for health technology assessment in China that accounts for health opportunity cost.
Methods
The elasticity of health outcomes with respect to health expenditure was estimated using variations across 30 provincial-level administrative divisions in 2017 controlling for a range of other factors and using an instrumental variable approach to account for endogeneity to assess robustness of results. The estimated elasticity was then used to calculate the cost per disability-adjusted life-year (DALY) averted by variations in Chinese health expenditure at the margin.
Results
The range estimated from this study, 27,923–52,247 (2017 RMB) (central estimate 37,446) per DALY averted or 47–88% of GDP per capita (central estimate 63%), shows that a cost per DALY averted cost-effectiveness threshold that reflects health opportunity costs is below 1 × GDP per capita.
Conclusion
Our results suggest that the current cost-effectiveness threshold used in China is too high; continuing to use it risks decisions that reduce overall population health.
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Availability of Data and Material
All data are publicly available.
Notes
Most variables considered in the study are available only up to 2017.
Our data exclude Tibet due to missing data. This leaves us with a sample size of 30.
The first two are only used when the health outcome is DALY rate since the other two are already age specific.
We consider 0.7 as the threshold for a too high correlation.
It would be ideal to control for provincial fixed effects. Unfortunately, there is insufficient within-province variation in the expenditure variable for this approach to be viable. We therefore chose to estimate pooled OLS, which is the same type of panel analysis that is undertaken in Siverskog and Henriksson [17].
Corresponding pooled OLS analysis looking at 2011–2017 for the mortality rate outcomes finds similar coefficient estimates. These results are presented in Table S2, Electronic Supplementary Material.
The statistical insignificance may be caused by the relatively small sample size; for example, large effect and large standard error at the same time.
Corresponding pooled OLS IV estimates for the mortality rate outcome models are found in Tables S3 and S4, Electronic Supplementary Material, which provide very similar coefficient estimates. Again, in each case, the IVs pass all three identification tests. The endogeneity tests suggest the exogeneity of health expenditure cannot be rejected based on the data.
Calculating using an exchange rate of 0.148 for 2017 from the World Bank https://data.worldbank.org/indicator/PA.NUS.FCRF.
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Acknowledgements
We are grateful for feedback received at the inception stage of this work during the 2nd China HTA Conference in Beijing and at a meeting at the Shanghai Health Development Research Centre in October 2019. We also thank Francesco Longo for useful discussions.
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JO, HW, YG and JL conceived the study design and drafted the initial manuscript. YG, JL and JO led on the data analysis. All authors commented on previous versions of the manuscript and approved the final manuscript.
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Ochalek, J., Wang, H., Gu, Y. et al. Informing a Cost-Effectiveness Threshold for Health Technology Assessment in China: A Marginal Productivity Approach. PharmacoEconomics 38, 1319–1331 (2020). https://doi.org/10.1007/s40273-020-00954-y
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DOI: https://doi.org/10.1007/s40273-020-00954-y