Vaccination Literacy and Its Determinants in Hungary: Results of a Cross-Sectional Survey.

INTRODUCTION/OBJECTIVES: Despite the efficacy of vaccines in preventing disease and disability and their cost-effectiveness, a proportion of the population remains reluctant to vaccination. Vaccination literacy is one of the main determinants of vaccine decision-making. The aims of this study were to assess the measurement properties of the Hungarian version of a vaccination literacy instrument and describe the level and determinants of vaccination literacy among the Hungarian adult population. METHODS: A cross-sectional study was conducted on a sample of 1205 Hungarian adult respondents within the European Health Literacy Population Survey 2019-2021. The data were collected by computer-assisted telephone survey in December 2020. The questionnaire covered the following topics: sociodemographic data, self-perceived health, social support, and general and vaccination literacy. The instrument's internal consistency was measured using Cronbach's alpha, its reliability was assessed based on the Spearman-Brown correlation coefficient. The construct validity of the questionnaire was examined using principal component analysis based on a polychoric correlation matrix. Multivariate ordered logistic regression analyses investigated the relationship between vaccination literacy and other relevant variables. RESULTS: The Cronbach's alpha was 0.78, while the Spearman-Brown correlation coefficient was 0.725. The principal component analysis extracted 1 significant factor that explained 69% of the total variance. The Hungarian adult population had a good level of vaccination literacy (mean score: 82.4, 95% CI 74.9-89.8). We found that social support (OR for the moderate support: 1.93, OR for the strong support: 2.19; P < .001 for both), lack of financial deprivation (OR: 2.05, P < .001), and secondary education level (OR: 1.50, P: .024) are positively correlated with vaccination literacy. CONCLUSION: We recommend using the vaccination literacy instrument to identify individuals with inadequate vaccination literacy. Interventions focusing on social support and education to promote vaccine-related information would contribute to enhancing vaccination literacy.