Is health literacy of adolescent athletes’ parents whose children belonged to sports clubs related to their children’s intention to receive medications, vaccines, supplements, and energy drinks? A cross-sectional study

Background: Adolescent athletes’ values ​regarding health behaviors, including their attitudes toward doping, are largely derived from those of their parents. Therefore, clarifying the factors that affect parents’ intentions regarding their children’s medicine intake and nutrition can help elucidate the process of forming values ​​of healthy behaviors in young athletes. Methods: Between March 8 and March 9, 2021, an online questionnaire survey was conducted via an Internet research company; data from 2,000 residents in Japan were collected. Participants were male and female residents aged 30–59 years with children in elementary or high school and belonging to sports clubs. The survey items included respondent’s and child’s basic information, respondent’s health literacy, and level of sports in which the respondent and child were (or are) engaged. Respondents were also asked if they would like their children to receive prescription drugs, over-the-counter drugs, herbal medicines, vaccines, supplements, or energy drinks. Logistic regression analysis was performed to analyze the relationship between respondents’ basic information and health literacy and their intention to receive prescription and over-the-counter drugs, herbal medicines, vaccines, supplements, and energy drinks. Results: Higher parental health literacy was associated with higher children’s willingness to receive prescription drugs (odds ratio [OR] = 1.025, 95% confidence interval [CI]: 1.016–1.035), over-the-counter drugs (OR = 1.012, 95% CI: 1.003–1.021), prescription herbal medicines (OR = 1.021, 95% CI: 1.021–1.030), over-the-counter herbal medicines (OR = 1.012, 95% CI: 1.003–1.021), and vaccines (OR = 1.025, 95% CI: 1.016–1.035). Conversely, the children’s intention to receive energy drinks (OR = 0.990, 95% CI: 0.980–1.000) decreased significantly. As the child’s athletic level increased, parents’ willingness for their children to receive oral prescription medicines decreased (OR = 0.886, 95% CI: 0.791–0.992) and that to receive supplements (OR = 1.492, 95% CI: 1.330–1.673) and energy drinks significantly increased (OR = 1.480, 95% CI: 1.307–1.676). Conclusion: Health literacy of adolescent athletes’ parents is associated with their children’s willingness to receive medicines. Healthcare providers should counsel parents of adolescent athletes to allow their children to receive necessary drug treatments and prevent doping violations caused by supplement intake.