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Effects of Perceived Benefit on Vitamin D Supplementation Intention: A Theory of Planned Behaviour Perspective

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  • Ying-Hsuan Chen

    (Ph.D. Program in Medical Biotechnology, National Chung Hsing University, Taichung 402, Taiwan)

  • Shun-Lung Chao

    (Taiwan Association of Preventive Health Care, New Taipei 231, Taiwan)

  • Yen-Wei Chu

    (Institute of Genomics and Bioinformatics, National Chung Hsing University, Taichung 402, Taiwan
    Institute of Molecular Biology, National Chung Hsing University, Taichung 402, Taiwan
    Agricultural Biotechnology Center, National Chung Hsing University, Taichung 402, Taiwan
    Ph.D. Program in Translational Medicine, National Chung Hsing University, Taichung 402, Taiwan)

Abstract

There are many factors that affect vitamin D supplementation, including those from the theory of planned behaviour (TPB); however, how the perceived benefit acts in the model remains unknown. In the current study, we tested the efficacy of the TPB and the impacts of the perceived benefit (PBE) in the model. The subjects were 287 customers who purchased vitD from pharmacies in major cities in Taiwan. A structured questionnaire was used to collect the data. t -tests, analysis of variance (ANOVA), regression analyses, and path analysis via SPSS and AMOS were used to analyse the data. The original TPB model explained 47.5% of the variance of intention with the three variables of attitude (β = 0.261), perceived behavioural control (β = 0.183), and subjective norms (β = 0.169). The model that incorporated PBE increased the explained variance to 59.7%, and PBE became the strongest predictor (β = 0.310) and a significant mediator linking attitude, subjective norms, perceived control (ANC) with supplementation intention. PBE and attitude were the two most important variables in predicting vitD supplementation intention. We suggest that updated information regarding dietary sources of vitD and its benefits should be included in health- or nutrition-related courses in education programs for the overall health of the nation.

Suggested Citation

  • Ying-Hsuan Chen & Shun-Lung Chao & Yen-Wei Chu, 2022. "Effects of Perceived Benefit on Vitamin D Supplementation Intention: A Theory of Planned Behaviour Perspective," IJERPH, MDPI, vol. 19(4), pages 1-18, February.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:4:p:1952-:d:745831
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    References listed on IDEAS

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    1. Link, B.G. & Phelan, J.C., 1996. "Understanding sociodemographic differences in health--the role of fundamental social causes," American Journal of Public Health, American Public Health Association, vol. 86(4), pages 471-473.
    2. Conner, Mark & McEachan, Rosemary & Lawton, Rebecca & Gardner, Peter, 2017. "Applying the reasoned action approach to understanding health protection and health risk behaviors," Social Science & Medicine, Elsevier, vol. 195(C), pages 140-148.
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    1. Nasser M. Al-Daghri & Hanan Alfawaz & Nasiruddin Khan & Yousef Al-Saleh & Naji J. Aljohani & Dara Aldisi & Ghadah Alkhaldi & Amani M. Alqarni & Hadeel O. Almasoudi & Lina A. Alshehri & Rinad M. Alanzi, 2022. "Association of Vitamin D Knowledge, Behavior and Attitude with BMI Status among Arab Adults," IJERPH, MDPI, vol. 19(17), pages 1-13, September.

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