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Dive into the research topics where Yumi Asukai is active.

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Featured researches published by Yumi Asukai.


Respiratory Medicine | 2011

Cost-utility analysis of indacaterol in Germany: A once-daily maintenance bronchodilator for patients with COPD

David Price; Alastair Gray; Rupert Gale; Yumi Asukai; Laura Mungapen; Adam Lloyd; Lars Peters; Katja Neidhardt; Tobias Gantner

INTRODUCTION Indacaterol is a novel inhaled once-daily long-acting beta(2)-agonist (LABA) for the maintenance treatment of COPD that has been compared to existing inhaled monotherapies on a number of symptomatic endpoints in clinical studies. With constrained healthcare budgets, the objective of this analysis was to evaluate the cost-effectiveness of indacaterol 150 μg, the approved starting dose for maintenance therapy, from a German heath service perspective against the most widely used bronchodilator tiotropium, and the twice-daily LABA, salmeterol. METHODS A Markov model was developed with the following main health states: Mild, Moderate, Severe, and Very Severe COPD, based on pre-bronchodilator FEV(1) measures reported in the indacaterol clinical trials, and death. Each disease severity health state had two associated health states for severe or non-severe exacerbation. The model considered patients with moderate to severe COPD, with a mean age of 64 years. The base case time horizon was three years, with discounting set at 3% for costs and benefits. Selected clinical inputs and health state utilities were derived from indacaterol clinical trials, while costs were based on publicly available drug prices and tariffs or published sources. Inputs describing disease progression were based on published data on the rate of FEV(1) decline. RESULTS Point-estimates show that indacaterol 150 μg is dominant (lower total costs and better outcomes) against tiotropium and salmeterol. An alternative analysis comparing indacaterol 300 μg (maximum dose) against tiotropium, showed an incremental cost-effectiveness ratio (ICER) of approximately €28,300 per QALY. CONCLUSION Indacaterol is cost-effective compared to tiotropium and salmeterol.


Journal of Medical Economics | 2013

Ipilimumab in 2nd line treatment of patients with advanced melanoma: a cost-effectiveness analysis

Victor Barzey; Michael B. Atkins; Louis P. Garrison; Yumi Asukai; S. Kotapati; John R. Penrod

Abstract Objective: To estimate the cost-effectiveness of ipilimumab (3 mg/kg) compared with best supportive care (BSC) in pre-treated advanced melanoma patients. Methods: The analysis was based on a US payer perspective and lifetime time horizon. A three-state Markov model was developed representing clinical outcomes, quality-of-life, and healthcare resource use of patients treated with ipilimumab and BSC. Transitions between states were modeled using overall and progression-free survival data from the MDX010-20 trial. Utility data were from a melanoma-specific study of the health state preferences of the general population. Disease management costs expressed in 2011 US Dollars were based on healthcare resource use observed in a US retrospective medical chart study. Uncertainty was analyzed using one-way and probabilistic sensitivity analyses. Results: The gain in life years and QALYs from introducing ipilimumab over BSC were 1.88 years (95% CI = 1.62–2.20) and 1.14 (95% CI = 1.01–1.34) QALYs, respectively, over the lifetime time horizon. The estimated incremental cost of treating with ipilimumab vs BSC was


BMC Cancer | 2010

Cost-effectiveness analysis of pemetrexed versus docetaxel in the second-line treatment of non-small cell lung cancer in Spain: results for the non-squamous histology population

Yumi Asukai; Amparo Valladares; Carlos Camps; Eifiona Wood; Kaisa Taipale; Jorge Arellano; Alejo Cassinello; José Antonio Sacristán; Tatiana Dilla

146,716 (95% CI = 


Value in Health | 2014

Cost-effectiveness models for chronic obstructive pulmonary disease: cross-model comparison of hypothetical treatment scenarios.

Martine Hoogendoorn; Talitha Feenstra; Yumi Asukai; Sixten Borg; Ryan N. Hansen; Sven-Arne Jansson; Yevgeniy Samyshkin; Margarethe Wacker; Andrew Briggs; Adam Lloyd; Sean D. Sullivan; Maureen Rutten-van Mölken

130,992–


PharmacoEconomics | 2013

Improving Clinical Reality in Chronic Obstructive Pulmonary Disease Economic Modelling: Development and Validation of a Micro-Simulation Approach

Yumi Asukai; Michael Baldwin; Tiago Fonseca; Alastair Gray; Laura Mungapen; David Price

164,025). The estimated incremental cost-effectiveness ratios were


Value in health regional issues | 2012

The Cost-Effectiveness and Budget Impact of Introducing Indacaterol into the Colombian Health System

Juan Guillermo Ariza; Per-Olof Thuresson; Gerardo Machnicki; Laura Mungapen; Matthias Kraemer; Yumi Asukai; Luis Fernando Giraldo

78,218 per life year gained and


Value in Health | 2016

Patient Heterogeneity in Health Economic Decision Models for Chronic Obstructive Pulmonary Disease: Are Current Models Suitable to Evaluate Personalized Medicine?

Martine Hoogendoorn; Talitha Feenstra; Yumi Asukai; Andrew Briggs; Sixten Borg; Roberto W. Dal Negro; Ryan N. Hansen; Sven-Arne Jansson; Reiner Leidl; Nancy Risebrough; Yevgeniy Samyshkin; Margarethe Wacker; Maureen Rutten-van Mölken

128,656 per QALY gained. Ipilimumab was 95% likely to be cost-effective at a willingness-to-pay of


Value in Health | 2017

External Validation of Health Economic Decision Models for Chronic Obstructive Pulmonary Disease (COPD): Report of the Third COPD Modeling Meeting

Martine Hoogendoorn; Talitha Feenstra; Yumi Asukai; Andrew Briggs; Ryan N. Hansen; Reiner Leidl; Nancy Risebrough; Yevgeniy Samyshkin; Margarethe Wacker; Maureen Rutten-van Mölken

146,000/QALY. Limitations: Ipilimumab’s method of action causes a tumor response pattern that differs from the Response Evaluation Criteria in Solid Tumors upon which the model is based, leading to a potential under-estimate of quality-of-life of ipilimumab patients. Survival and QALY gains were related to the time horizon of the analysis. Sensitivity analyses indicated that qualitative conclusions regarding the cost-effectiveness of ipilimumab were unchanged when the method of quality adjustment and the time horizon were varied. Conclusion: The analysis shows that the estimated cost-effectiveness of ipilimumab is within what has been shown to be acceptable to payers for oncology products in the US.


PharmacoEconomics | 2013

Cost-Effectiveness of Rivaroxaban Versus Warfarin for Stroke Prevention in Atrial Fibrillation in the Belgian Healthcare Setting

Joris Kleintjens; Xiaochen Li; Steven Simoens; Vincent Thijs; Marnix Goethals; Ernst Rietzschel; Yumi Asukai; Omer Saka; Thomas Evers; Petra Faes; Stefaan Vansieleghem; Mimi De Ruyck

BackgroundThe objective of this study was to conduct a cost-effectiveness evaluation of pemetrexed compared to docetaxel in the treatment of advanced or metastatic non-small cell lung cancer (NSCLC) for patients with predominantly non-squamous histology in the Spanish healthcare setting.MethodsA Markov model was designed consisting of stable, responsive, progressive disease and death states. Patients could also experience adverse events as long as they received chemotherapy. Clinical inputs were based on an analysis of a phase III clinical trial that identified a statistically significant improvement in overall survival for non-squamous patients treated with pemetrexed compared with docetaxel. Costs were collected from the Spanish healthcare perspective.ResultsOutcomes of the model included total costs, total quality-adjusted life years (QALYs), total life years gained (LYG) and total progression-free survival (PFS). Mean survival was 1.03 years for the pemetrexed arm and 0.89 years in the docetaxel arm; QALYs were 0.52 compared to 0.42. Per-patient lifetime costs were € 34677 and € 32343, respectively. Incremental cost-effectiveness ratios were € 23967 per QALY gained and € 17225 per LYG.ConclusionsPemetrexed as a second-line treatment option for patients with a predominantly non-squamous histology in NSCLC is a cost-effective alternative to docetaxel according to the € 30000/QALY threshold commonly accepted in Spain.


Applied Health Economics and Health Policy | 2013

A UK-Based Cost-Utility Analysis of Indacaterol, A Once-Daily Maintenance Bronchodilator for Patients with COPD, Using Real World Evidence on Resource Use

David Price; Yumi Asukai; Jaithri Ananthapavan; Bill Malcolm; Amr Radwan; Ian Keyzor

OBJECTIVES To compare different chronic obstructive pulmonary disease (COPD) cost-effectiveness models with respect to structure and input parameters and to cross-validate the models by running the same hypothetical treatment scenarios. METHODS COPD modeling groups simulated four hypothetical interventions with their model and compared the results with a reference scenario of no intervention. The four interventions modeled assumed 1) 20% reduction in decline in lung function, 2) 25% reduction in exacerbation frequency, 3) 10% reduction in all-cause mortality, and 4) all these effects combined. The interventions were simulated for a 5-year and lifetime horizon with standardization, if possible, for sex, age, COPD severity, smoking status, exacerbation frequencies, mortality due to other causes, utilities, costs, and discount rates. Furthermore, uncertainty around the outcomes of intervention four was compared. RESULTS Seven out of nine contacted COPD modeling groups agreed to participate. The 5-year incremental cost-effectiveness ratios (ICERs) for the most comprehensive intervention, intervention four, was €17,000/quality-adjusted life-year (QALY) for two models, €25,000 to €28,000/QALY for three models, and €47,000/QALY for the remaining two models. Differences in the ICERs could mainly be explained by differences in input values for disease progression, exacerbation-related mortality, and all-cause mortality, with high input values resulting in low ICERs and vice versa. Lifetime results were mainly affected by the input values for mortality. The probability of intervention four to be cost-effective at a willingness-to-pay value of €50,000/QALY was 90% to 100% for five models and about 70% and 50% for the other two models, respectively. CONCLUSIONS Mortality was the most important factor determining the differences in cost-effectiveness outcomes between models.

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Talitha Feenstra

University Medical Center Groningen

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Ryan N. Hansen

University of Washington

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Martine Hoogendoorn

Erasmus University Rotterdam

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David Price

University of Aberdeen

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