Development of Willingness-to-Pay Questionnaire on Health Insurance Cost-Sharing for Catastrophic Prescription Drugs: A Content Validity and Reliability Assessment
Keywords:
Willingness-to-Pay, Content validity, Prescription Drug Cost-Sharing, Health Insurance, Questionnaire
Abstract
Prescription drug cost-sharing in Indonesia remains challenging because no valid willingness-to-pay (WTP) questionnaire for this cost-sharing is available. The aim of this study was to conduct item selection and evaluate the content validity of the questionnaire on the WTP for prescription drug cost-sharing under the national health insurance scheme in patients with catastrophic illnesses. The method was a cross-sectional study and used a three-step design, namely literature review, consultation with some health economics experts, and evaluation of content validity. This study involved 9 experts, consisting of academicians and health professionals who worked in a hospital, to perform content validation of a questionnaire on the WTP for prescription drug cost-sharing. This study used CVI (content validity index) and CVR (content validity ratio) for both individual item measurement and the overall scale. This study's results reveal a questionnaire comprising 47 items grouped into five domains: healthcare utilization information, participation in health insurance information, drug information, and cost-sharing scenarios. The questionnaire items were extracted from many sources. The items that could be used for the study should have an I-CVI of 0.79-1.00. There were three items removed because of criticisms from the experts and Item-CVI<0.79 and CVR<0.62. Those with Item-CVI>0.79 were revised. The overall scale of the questionnaire was excellent with an S-CVI/Ave of 0.94. We conclude that the questionnaire on the willingness-to-pay for prescription drug cost-sharing was developed and validated through expert consultation, item selection, and CVI. The questionnaire reviewed in this study had good content validity. As a follow-up, a new 42-item questionnaire was developed.
References
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Kado, A., Merga, B. T., Adem, H. A., Dessie, Y., & Geda, B. (2020). Willingness to Pay for Community-Based Health Insurance Scheme and Associated Factors Among Rural Communities in Gemmachis District, Eastern Ethiopia. ClinicoEconomics and Outcomes Research: CEOR, 12, 609–618. https://doi.org/10.2147/CEOR.S266497
Koohi Rostamkalaee, Z., Jafari, M., & Gorji, H. A. (2022). A systematic review of strategies used for controlling consumer moral hazard in health systems. BMC Health Services Research, 22(1), 1260. https://doi.org/10.1186/s12913-022-08613-y
Lavoie Smith, E., Haupt, R., Kelly, J., Lee, D., Kanzawa-Lee, G., Knoerl, R., Bridges, C., Alberti, P., Prasertsri, N., & Donohoe, C. (2017). The Content Validity of a Chemotherapy-Induced Peripheral Neuropathy Patient-Reported Outcome Measure. Oncology Nursing Forum, 44(5), 580–588. https://doi.org/10.1188/17.ONF.580-588
Lawshe, C. H. (1975). A QUANTITATIVE APPROACH TO CONTENT VALIDITY. Personnel Psychology, 28(4), 563–575. https://doi.org/10.1111/j.1744-6570.1975.tb01393.x
Lynn, M. R. (1986). Determination and Quantification Of Content Validity: Nursing Research, 35(6), 382???386. https://doi.org/10.1097/00006199-198611000-00017
Mekonne, A., Seifu, B., Hailu, C., & Atomsa, A. (2020). Willingness to Pay for Social Health Insurance and Associated Factors among Health Care Providers in Addis Ababa, Ethiopia. BioMed Research International, 2020, 1–7. https://doi.org/10.1155/2020/8412957
Minyihun, A., Gebregziabher, M. G., & Gelaw, Y. A. (2019). Willingness to pay for community-based health insurance and associated factors among rural households of Bugna District, Northeast Ethiopia. BMC Research Notes, 12(1), 1–7. https://doi.org/10.1186/s13104-019-4091-9
Moghaddam, N. M., Jame, S. Z. B., Rafiei, S., Sarem, A. A., Ghamchili, A., & Shafii, M. (2019). Managerial competencies of head nurses: A model and assessment tool. British Journal of Nursing, 28(1), 30–37. https://doi.org/10.12968/bjon.2019.28.1.30
Mohamad Marzuki, M. F., Yaacob, N. A., & Yaacob, N. M. (2018). Translation, Cross-Cultural Adaptation, and Validation of the Malay Version of the System Usability Scale Questionnaire for the Assessment of Mobile Apps. JMIR Human Factors, 5(2), e10308. https://doi.org/10.2196/10308
Moshki, M., Khajavi, A., Sadeghi-Bazargani, H., Vahedi, S., & Pour-Doulati, S. (2020). Developing Pedestrians’ Red-light Violation Behavior Questionnaire (PRVBQ); Assessment of Content Validity and Reliability. Bulletin of Emergency and Trauma, 8(2), 98–106. https://doi.org/10.30476/BEAT.2020.46449
Musgrove, P., Zeramdini, R., & Carrin, G. (2002). Basic patterns in national health expenditure. Bulletin of the World Health Organization, 13.
Najafi, F., & Kheiri, B. (2012). Investigating the Impact of Country of Origin on Customer Behavior: Investigation of the Moderating Roles of Product Involvement and Product Familiarity on Product Evaluation and Customer Behavioral Intentions. Jounal of Marketing Management, 7(17), 37–60.
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Nosratnejad, S., Rashidian, A., Mehrara, M., Akbari Sari, A., Mahdavi, G., & Moeini, M. (2014). Willingness to pay for the social health insurance in Iran. Global Journal of Health Science, 6(5), 154–163. https://doi.org/10.5539/gjhs.v6n5p154
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Published
2024-03-25
How to Cite
Nugraheni, D. A., Satibi, S., Kristina, S. A., & Puspandari, D. A. (2024). Development of Willingness-to-Pay Questionnaire on Health Insurance Cost-Sharing for Catastrophic Prescription Drugs: A Content Validity and Reliability Assessment. Indonesian Journal of Pharmacy, 35(1), 171-184. https://doi.org/10.22146/ijp.7173
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Section
Research Article
