Nugraheni, Diesty Anita and Satibi, Satibi and Kristina, Susi Ari and Puspandari, Diah Ayu (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). pp. 171-184. ISSN 23389427
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Abstract
Prescription drug cost-sharing in Indonesia remains challenging because no valid willingness-to-pay (WTP) questionnaire on cost-sharing is available. This study aimed to conduct an item selection and assess the content validity of a WTP questionnaire for prescription drug cost-sharing under the national health insurance scheme in patients suffering from catastrophic illnesses. The method was a cross-sectional study and used a four-step design, including study development, content validity, response process, and reliability. This research involved nine experts, including professionals, academics, and pharmacy experts in hospitals, to validate the content of a WTP questionnaire for prescription drug cost-sharing. The questionnaire items were extracted from many sources, such as cost analysis of catastrophic prescription drug data in Indonesia and reviews of articles with the terms “willingness-to-pay,” “cost-sharing,” “health insurance,” “prescription,” and “questionnaire.” This content validity study used the content validity index (CVI) and content validity ratio (CVR) for both the individual item measurement and the overall scale. The Pearson correlation was assessed for the test–retest reliability. A draft questionnaire of 47 items was developed with four domains: healthcare utilization information, participation in health insurance information, drug information, and cost-sharing scenarios. Three items were removed, and three were merged based on the content validity study. The overall scale of the questionnaire was good with 0.94 S-CVI/Ave. The test–retest reliability coefficient had a strong correlation (r = 0.98). We conclude that the WTP questionnaire for prescription drug cost-sharing had been developed and validated through evidence validity, including content validity (CVI and CVR), response process, and reliability. As a follow-up, a new 42-item questionnaire was developed. Copyright © 2024 by Indonesian Journal of Pharmacy (IJP).
Item Type: | Article |
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Additional Information: | Cited by: 0; All Open Access, Gold Open Access |
Uncontrolled Keywords: | prescription drug; acute disease; adult; Article; cerebrovascular accident; clinical assessment; construct validity; content validity; cost benefit analysis; cross-sectional study; drug cost; drug information; female; follow up; health care cost; health care personnel; health care utilization; heart disease; hospital pharmacy; human; malignant neoplasm; medical expert; medical information; national health insurance; observational study; pharmacist; pharmacy (shop); prescription; private hospital; public hospital; quantitative study; questionnaire; reliability; terminal disease; test retest reliability; Willingness To Pay |
Subjects: | R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine |
Divisions: | Faculty of Medicine, Public Health and Nursing > Public Health and Nutrition |
Depositing User: | Mukhotib Mukhotib |
Date Deposited: | 14 Mar 2025 03:09 |
Last Modified: | 14 Mar 2025 03:09 |
URI: | https://ir.lib.ugm.ac.id/id/eprint/15748 |