IDEAS home Printed from https://ideas.repec.org/a/plo/pone00/0218398.html
   My bibliography  Save this article

Knowledge about dietary supplements and trust in advertising them: Development and validation of the questionnaires and preliminary results of the association between the constructs

Author

Listed:
  • Michał Seweryn Karbownik
  • Ewelina Paul
  • Maja Nowicka
  • Zuzanna Nowicka
  • Radosław Przemysław Kowalczyk
  • Edward Kowalczyk
  • Tadeusz Pietras

Abstract

Background: Despite offering little overall benefit and emerging concerns about their safety, dietary supplements have become increasingly popular. Trust in advertising them may contribute to high confidence in dietary supplements in public opinion. Aim: To develop and validate a screening questionnaire intended for the general public regarding knowledge about dietary supplements and a questionnaire on trust in advertising dietary supplements, and to identify the association between these constructs. Materials and methods: The development and validation of the measures was overseen by the panels of experts. The conceptual frameworks of the constructs were scientifically well grounded. A set of semi-structured interviews and anonymous web-based surveys was performed. The final questionnaire was applied to 220 non-medically educated people and 121 medically educated people. Results: A 17-item questionnaire on knowledge about dietary supplements and eight-item questionnaire on trust in advertising dietary supplements were developed. The measures presented satisfactory proof of validity, however, the psychometric properties of the questionnaire on knowledge were modest. Both the knowledge about dietary supplements in the study group and trust in advertising them were low. A significant negative relationship was found between knowledge about dietary supplements and trust in advertising them among the general public (Pearson’s r = -0.42, 95%CI: -0.52 to -0.30, p

Suggested Citation

  • Michał Seweryn Karbownik & Ewelina Paul & Maja Nowicka & Zuzanna Nowicka & Radosław Przemysław Kowalczyk & Edward Kowalczyk & Tadeusz Pietras, 2019. "Knowledge about dietary supplements and trust in advertising them: Development and validation of the questionnaires and preliminary results of the association between the constructs," PLOS ONE, Public Library of Science, vol. 14(6), pages 1-24, June.
    • Handle: RePEc:plo:pone00:0218398
    DOI: 10.1371/journal.pone.0218398
    as

    Download full text from publisher

    File URL: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0218398
    Download Restriction: no
    File URL: https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0218398&type=printable
    Download Restriction: no
    File URL: https://libkey.io/10.1371/journal.pone.0218398?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. Cees van der Eijk & Jonathan Rose, 2015. "Risky Business: Factor Analysis of Survey Data – Assessing the Probability of Incorrect Dimensionalisation," PLOS ONE, Public Library of Science, vol. 10(3), pages 1-31, March.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Shian-Yang Tzeng & Tzu-Ya Ho, 2022. "Exploring the Effects of Product Knowledge, Trust, and Distrust in the Health Belief Model to Predict Attitude Toward Dietary Supplements," SAGE Open, , vol. 12(1), pages 21582440211, January.
    2. Regina Ewa Wierzejska & Agnieszka Wiosetek-Reske & Magdalena Siuba-Strzelińska & Barbara Wojda, 2022. "Health-Related Content of TV and Radio Advertising of Dietary Supplements—Analysis of Legal Aspects after Introduction of Self-Regulation for Advertising of These Products in Poland," IJERPH, MDPI, vol. 19(13), pages 1-15, June.
    3. Jinkyung Choi, 2019. "The Association Between Health Conditions, Consciousness, Involvement, and Knowledge and Dietary Supplement Intake among University Students in South Korea," IJERPH, MDPI, vol. 16(20), pages 1-12, October.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Hartung, Peter, 2020. "The impact of self-awareness on leadership behavior," Journal of Applied Leadership and Management, Hochschule Kempten - University of Applied Sciences, Professional School of Business & Technology, vol. 8, pages 1-21.
    2. William T. Hu & Stephanie M. Bergren & Dana K. Dychtwald & Yiming Ma & XinQi Dong, 2023. "Variations in racial and ethnic groups’ trust in researchers associated with willingness to participate in research," Palgrave Communications, Palgrave Macmillan, vol. 10(1), pages 1-10, December.
    3. Piotr Koc, 2021. "Measuring Non-electoral Political Participation: Bi-factor Model as a Tool to Extract Dimensions," Social Indicators Research: An International and Interdisciplinary Journal for Quality-of-Life Measurement, Springer, vol. 156(1), pages 271-287, July.
    4. Jane Zavisca & Theodore Gerber & Hyungjun Suh, 2021. "Housing Status in Post-Soviet Contexts: A Multi-dimensional Measurement Approach," Social Indicators Research: An International and Interdisciplinary Journal for Quality-of-Life Measurement, Springer, vol. 153(2), pages 609-634, January.
    5. Mohammad Al-Khasawneh & Shafig Al-Haddad & Abdel-Aziz Ahmad Sharabati & Hebatallah Hisham Al Khalili & Lana Laith Azar & Farah Waleed Ghabayen & Leen Mazen Jaber & Mariam Husam Ali & Ra’ed Masa’deh, 2023. "How Online Communities Affect Online Community Engagement and Word-of-Mouth Intention," Sustainability, MDPI, vol. 15(15), pages 1-23, August.
    6. Mohammad Al Khasawneh & Abdel-Aziz Ahmad Sharabati & Shafig Al-Haddad & Rania Al-Daher & Sarah Hammouri & Sima Shaqman, 2023. "Consumer’s Attitude towards Display Google Ads," Future Internet, MDPI, vol. 15(4), pages 1-19, April.
    7. Mirko Antino & Jesús M. Alvarado & Rodrigo A. Asún & Paul Bliese, 2020. "Rethinking the Exploration of Dichotomous Data: Mokken Scale Analysis Versus Factorial Analysis," Sociological Methods & Research, , vol. 49(4), pages 839-867, November.
    8. Phoom Srisook, & Vinai Panjakajornsak,, 2017. "Southeast Asian low-cost carrier airline competitiveness: A solution for economic growth," Business and Economic Horizons (BEH), Prague Development Center, vol. 13(4), pages 536-555, October.
    9. Puris Sornsaruht, & Sudaporn Sawmong,, 2017. "Antecedents of Thai Select restaurant brand loyalty in the United Kingdom," Business and Economic Horizons (BEH), Prague Development Center, vol. 13(4), pages 478-495, October.
    10. Andersson-Hudson, Jessica & Rose, Jonathan & Humphrey, Mathew & Knight, Wil & O'Hara, Sarah, 2019. "The structure of attitudes towards shale gas extraction in the United Kingdom," Energy Policy, Elsevier, vol. 129(C), pages 693-697.
    11. Honda, Hikaru & Kita, Toshiko & Hirano, Michiyo & Saeki, Kazuko, 2020. "A strategy to rescue mothers from isolated parenting: Development of the “social connectivity of mother with people in the community scale”," Children and Youth Services Review, Elsevier, vol. 118(C).
    12. Cullen, Paula & Ryan, Mary & O’Donoghue, Cathal & Hynes, Stephen & hUallacháin, Daire Ó & Sheridan, Helen, 2020. "Impact of farmer self-identity and attitudes on participation in agri-environment schemes," Land Use Policy, Elsevier, vol. 95(C).
    13. Tuomas Eerola & Henna-Riikka Peltola, 2016. "Memorable Experiences with Sad Music—Reasons, Reactions and Mechanisms of Three Types of Experiences," PLOS ONE, Public Library of Science, vol. 11(6), pages 1-29, June.
    14. Jonathan Rose & Cees van der Eijk, 2022. "The World Isn’t Fair, but Shouldn’t Elections Be? Evaluating Prospective Beliefs about the Fairness of Elections and Referenda," Societies, MDPI, vol. 12(3), pages 1-27, May.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:plo:pone00:0218398. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: plosone (email available below). General contact details of provider: https://journals.plos.org/plosone/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.