Displaying publications 1 - 20 of 187 in total

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  1. Tanvejsilp P, Taychakhoonavudh S, Chaikledkaew U, Chaiyakunapruk N, Ngorsuraches S
    Value Health Reg Issues, 2019 May;18:78-82.
    PMID: 30641410 DOI: 10.1016/j.vhri.2018.11.004
    OBJECTIVES: To describe the process, challenges, and future direction of health technology assessment (HTA), focusing on the drug selection of the National List of Essential Medicines (NLEM) in Thailand.

    METHODS: Literature and government documents were reviewed and analyzed by authors with experiences in HTA and drug policy in the country.

    RESULTS: The structure of HTA and its process in the drug selection of the NLEM were described, followed by the outcomes of the use of HTA. Examples of lowering drug prices, as a result of price negotiation using HTA, were presented. A few examples were also provided to demonstrate how decisions were made from considering factors beyond cost-effectiveness findings. Finally, challenges on various issues including improvement of HTA structure and process were discussed for the future direction of HTA in Thailand.

    CONCLUSIONS: HTA has been adopted as a tool for the drug selection of the NLEM to help Thailand achieve universal health coverage. Nevertheless, various challenges exist and need to be addressed.

  2. Teoh SL, Ngorsuraches S, Lai NM, Chaiyakunapruk N
    Value Health Reg Issues, 2021 May;24:167-172.
    PMID: 33714105 DOI: 10.1016/j.vhri.2020.09.003
    OBJECTIVES: Globally, nutraceuticals have been increasingly used. Nevertheless, the consumer preferences for nutraceuticals have not been quantitatively investigated. This study used discrete choice experiment (DCE) to examine consumer preferences and willingness to pay for nutraceuticals.

    METHODS: Four attributes (ie, the scientific proof of effectiveness, the scientific proof of safety, the source of recommendation, and cost) were identified from a systematic review and focus group interviews. They were used to develop a DCE questionnaire. Consumers at community pharmacies in Malaysia were asked to respond to 8 DCE choice sets. A conditional logit model was employed to obtain the relative importance of each attribute and to estimate respondents' WTP for nutraceuticals.

    RESULTS: A total of 111 valid responses were analyzed. A negative constant term in the developed model indicated that generally the respondents preferred not to use nutraceuticals before they considered the study attributes. The respondents preferred nutraceuticals with no side effect, clear evidence of effectiveness, and recommendation of a healthcare professional. The respondents were willing to pay $252/month more for nutraceuticals proven with no side effect than for those without proof of safety, and $102/month more for nutraceuticals proven with clear effectiveness than for those without proof of effectiveness.

    CONCLUSIONS: Consumers weighed relatively high on the availability of safety and effectiveness proofs when they chose nutraceuticals. The study highlights on the crucial need to inform consumers using clinical evidences of nutraceuticals as the information is highly preferred by consumers.

  3. Dilokthornsakul P, Chaiyakunapruk N, Jeanpeerapong N, Lee TA
    Value Health Reg Issues, 2014 May;3:222-228.
    PMID: 29702931 DOI: 10.1016/j.vhri.2014.04.013
    OBJECTIVES: To evaluate whether there are differences in propensity score (PS) and treatment effects estimated using conventional and calendar time-specific PS (CTS-PS) approaches.

    METHODS: A retrospective database analysis at a university-affiliated hospital in Thailand was used. Diabetic patients receiving glucose-lowering medications from July 2008 to June 2011 were included. Patients were categorized into those exposed and not exposed to thiazolidinediones (TZDs). PSs were estimated by using conventional PS and CTS-PS. In the CTS-PS, PS was separately estimated for three specific calendar time periods. Patients were matched 1:1 using caliper matching. The outcomes were cardiovascular and all-cause hospitalizations. The TZD and non-TZD groups were compared with Cox proportional hazard models.

    RESULTS: A total of 2165 patients were included. The average conventional PS was 0.198 (95% confidence interval [CI] 0.195-0.202), while the average PS in the CTS-PS approach was 0.212 (0.206-0.218), 0.180 (0.173-0.188), and 0.205 (0.197-0.213) for July 2008 to June 2009, July 2009 to June 2010, and July 2010 to June 2011, respectively. The average difference in PS was 0.012 (P < 0.001), -0.009 (P ≤ 0.002), and 0.000 (P = 0.950) in the three calendar time periods. The adjusted hazard ratios of the conventional PS-matched cohort were 0.97 (95% CI 0.39-2.45) and 0.97 (95% CI 0.78-1.20) for CVD-related and all-cause hospitalizations, while the adjusted hazard ratios of the CTS-PS-matched cohort were 1.11 (95% CI 0.43-2.88) and 1.12 (95% CI 0.91-1.39), respectively.

    CONCLUSION: CTS-PS is different from PS estimated by using the conventional approach. CTS-PS should be considered when a pattern of medication use has changed over the study period.

  4. Dilokthornsakul P, McQueen RB, Chaiyakunapruk N, Spackman E, Watanabe JH, Campbell JD
    Value Health Reg Issues, 2016 May;9:99-104.
    PMID: 27881269 DOI: 10.1016/j.vhri.2015.12.003
    Health technology assessment is a form of health policy research that provides policymakers with information relevant to decisions about policy alternatives. Findings from cost-effectiveness analysis (CEA) are one of the important aspects of health technology assessment. Nevertheless, the more advanced method of value of information (VOI), which is recommended by the International Society for Pharmacoeconomics and Outcomes Research and Society for Medical Decision Making Modeling Good Research Practices Task Force, has rarely been applied in CEA studies in Asia. The lack of VOI in Asian CEA studies may be due to limited understanding of VOI methods and what VOI can and cannot help policy decision makers accomplish. This concept article offers audiences a practical primer in understanding the calculation, presentation, and policy implications of VOI. In addition, it provides a rapid survey of health technology assessment guidelines and literature related to VOI in Asia and discusses the future directions of VOI use in Asia and its potential barriers. This article will enable health economists, outcomes researchers, and policymakers in Asia to better understand the importance of VOI analysis and its implications, leading to the appropriate use of VOI in Asia.
  5. Dilokthornsakul P, Lee TA, Dhippayom T, Jeanpeerapong N, Chaiyakunapruk N
    Value Health Reg Issues, 2016 May;9:105-111.
    PMID: 27881251 DOI: 10.1016/j.vhri.2016.03.001
    BACKGROUND: To compare health care utilization and cost by asthma severity and type of health insurance in Thailand.

    METHODS: A retrospective cohort study using an electronic database was conducted in patients with asthma. Patients who were diagnosed with asthma from 2009 to 2011, had at least two subsequent health care encounters for asthma during the first six months after the first asthma diagnosis, and had at least 90 days of follow-up were included. The primary outcome was direct health care costs of inpatient and outpatient care. We compared outcomes between groups on the basis of a proxy of severity (mild/moderate severe asthma vs. high severe asthma) and type of health insurance using a multivariable generalized linear model. Covariates such as Patients' demographic characteristics, comorbidities, and concurrent medications were included in the model.

    RESULTS: Among 1982 patients included, the average age was 40.3 ± 24.0 years, with 60.7% being males. A total of 1936 patients had mild/moderate severe asthma, whereas 46 patients had high severe asthma. There were 1293 patients under the Universal Coverage Scheme, 264 patients under Social Security Insurance, and 626 patients under the Civil Servant Medical Benefit Scheme (CSMBS). The average annual cost per patient was $598 ± $871. In adjusted analyses, the health care cost of patients with high severe asthma was $71 higher than that of patients with mild/moderate severe asthma (95% confidence interval $-131 to $274). The cost of patients under the CSMBS was $110 (95% confidence interval $29-$191) higher than that of patients under Universal Coverage Scheme.

    CONCLUSIONS: Health care costs of patients with asthma were substantial and were higher in patients with high severe asthma and patients under the CSMBS.
  6. Watanabe AH, Lee SWH, Chai-Adisaksopha C, Lim MY, Chaiyakunapruk N
    Value Health Reg Issues, 2021 Nov 17;28:7-13.
    PMID: 34800834 DOI: 10.1016/j.vhri.2021.07.003
    OBJECTIVES: To examine the budget impact of emicizumab as prophylactic therapy in reducing the frequency of bleeding episodes in patients with hemophilia A with inhibitors in Malaysia.

    METHODS: A budget impact model was built to assess the cost implication of introducing emicizumab for routine prophylaxis of bleeding episodes in people with hemophilia A with inhibitors. It was based on the public healthcare system in Malaysia over a 5-year duration. The primary analysis computed healthcare costs for emicizumab compared with no prophylactic regimen to calculate the budget needed to treat all patients with hemophilia A with inhibitors.

    RESULTS: The introduction of emicizumab resulted in a total incremental budget of Malaysian Ringgit (RM) 20 356 897 ($4 917 125) during the first year. The total cost for the current situation (no prophylaxis) was RM13 425 941 ($3 242 981), whereas the total cost for the new situation (prophylaxis with emicizumab) was RM33 782 838 ($8 160 106). The 5-year cumulative incremental budget impact from 2021 to 2025 was RM97 205 459 ($23 479 579) with an uncertainty range from -RM4 869 886 (-$1 176 301) to RM138 035 597 ($33 341 932) and a total of 72 patients treated with emicizumab. In a sensitivity analysis, the use of emicizumab was cost saving if the annual bleeding rate was greater than 16 instead of 6 times per year.

    CONCLUSION: The 5-year budget impact might be considered reasonable and possibly cost saving. The model and approach used in this study to obtain relevant parameters where scarce data exist may help other jurisdictions with future adaptation.

  7. Sim R, Chong CW, Loganadan NK, Saidoung P, Adam NL, Hussein Z, et al.
    Value Health Reg Issues, 2023 Nov;38:9-17.
    PMID: 37419012 DOI: 10.1016/j.vhri.2023.05.006
    OBJECTIVES: This study aims to evaluate the cost-effectiveness of various glucose-lowering therapies as add-on to standard care for people with type 2 diabetes (T2D) in Malaysia.

    METHODS: A state-transition microsimulation model was developed to compare the clinical and economic outcomes of 4 treatments: standard care, dipeptidyl peptidase-4 inhibitors, sodium-glucose cotransporter-2 inhibitors (SGLT2is), and glucagon-like peptide-1 receptor agonists. Cost-effectiveness was assessed from a healthcare provider's perspective over a lifetime horizon with 3% discount rate in a hypothetical cohort of people with T2D. Data input were informed from literature and local data when available. Outcome measures include costs, quality-adjusted life-years, incremental cost-effectiveness ratios, and net monetary benefits. Univariate and probabilistic sensitivity analyses were performed to assess uncertainties.

    RESULTS: Over a lifetime horizon, the costs to treat a person with T2D ranged from RM 12 494 to RM 41 250, whereas the QALYs gains ranged from 6.155 to 6.731, depending on the treatment. Based upon a willingness-to-pay threshold of RM 29 080 per QALY, we identified SGLT2i as the most cost-effective glucose-lowering treatment, as add-on to standard care over patient's lifetime, with the net monetary benefit of RM 176 173 and incremental cost-effectiveness ratios of RM 12 279 per QALY gained. The intervention also added 0.577 QALYs and 0.809 LYs compared with standard care. Cost-effectiveness acceptability curve showed that SGLT2i had the highest probability of being cost-effective in Malaysia across varying willingness-to-pay threshold. The results were robust to various sensitivity analyses.

    CONCLUSIONS: SGLT2i was found to be the most cost-effective intervention to mitigate diabetes-related complications.

  8. Crawford B, Permsuwan U, Thongprasert S, Sakulbumrungsil R, Chaiyakunapruk N, Leartsakulpanitch J, et al.
    Value Health, 2014 Nov;17(7):A738.
    PMID: 27202652 DOI: 10.1016/j.jval.2014.08.121
  9. Chong HY, Saokaew S, Dumrongprat K, Permsuwan U, Sritara P, Chaiyakunapruk N
    Value Health, 2014 Nov;17(7):A760.
    PMID: 27202779 DOI: 10.1016/j.jval.2014.08.254
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