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Current Alzheimer Research

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ISSN (Print): 1567-2050
ISSN (Online): 1875-5828

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Research Article

Heterogeneity in Cost-Effectiveness Analysis of Vaccination for Mild and Moderate Alzheimer’s Disease

Author(s): Chung-Hsien Lin, Jean Ching-Yuan Fann, Sam Li-Sheng Chen, Hsiu-Hsi Chen and Kuen-Cheh Yang*

Volume 16, Issue 6, 2019

Page: [495 - 504] Pages: 10

DOI: 10.2174/1567205016666190612162121

Abstract

Background: Immunotherapy for Alzheimer’s disease(AD) has gained momentum in recent years. One of the concerns over its application pertains to Cost-Effectiveness Analysis (CEA) from population average and specific subgroup differences, as such a therapy is imperative for health decisionmakers to allocate limited resources. However, this sort of CEA model considering heterogeneous population with risk factors adjustment has been rarely addressed.

Methods: We aimed to show the heterogeneity of CEA in immunotherapy for AD in comparison with the comparator without intervention. Economic evaluation was performed via incremental Cost- Effectiveness Ratio (ICER) and Cost-Effectiveness Acceptability Curve (CEAC) in terms of the Quality- Adjusted Life Years (QALY). First, population-average CEA was performed with and without adjustment for age and gender. Secondly, sub-group CEA was performed with the stratification of gender and age based on Markov process.

Results: Given the threshold of $20,000 of willingness to pay, the results of ICER without and with adjustment for age and gender revealed similar results ($14,691/QALY and $17,604/QALY). The subgroup ICER results by different age groups and gender showed substantial differences. The CEAC showed that the probability of being cost-effective was only 48.8%-53.3% in terms of QALY at population level but varied from 83.5% in women aged 50-64 years, following women aged 65-74 years and decreased to 0.2% in men≥ 75 years.

Conclusion: There were considerable heterogeneities observed in the CEA of vaccination for AD. As with the development of personalized medicine, the CEA results assessed by health decision-maker should not only be considered by population-average level but also specific sub-group levels.

Keywords: Alzheimer's disease, immunotherapy, vaccination, cost-effectiveness analysis, heterogeneity, personalized medicine.

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