Abstract

Abstract Background Health literacy has emerged as a crucial concept in public health. It is considered a modifiable determinant influencing health-related decision. One such decision is the adoption of specific dietary patterns. The Mediterranean diet has garnered recognition as one of the healthiest diets. This study aims to explore the association between health literacy levels among adults in socially vulnerable contexts and their adherence to the Mediterranean diet. Methods This study is part of a cluster-randomized trial conducted in primary schools from socially vulnerable contexts. A total of 469 parents of school-aged children agreed to participate. Health literacy was assessed using the Health Literacy Survey Questionnaire. Adherence to the Mediterranean diet was evaluated using the MEDAS questionnaire. Anthropometric and sociodemographic variables were self-reported via questionnaire. Parental BMI was calculated using weight/height^2. Education level was categorized into two groups (less than higher education and higher education), while professional status was classified based on the occupational categories of collar color. Generalized linear models were utilized for the analysis. Results Individuals with higher levels of health literacy present a greater odd to adhere to the Mediterranean diet (B = 0.022, 95% CI 0.010-0.035), even after adjusting for potential confounders (B = 0.019, 95% CI 0.006-0.032). Conclusions Health literacy emerges as a crucial factor influencing individuals’ dietary choices, as evidenced by its association with higher adherence to the Mediterranean diet. These findings underscore the importance of implementing policies and initiatives aimed at promoting health literacy, particularly among individuals from socially vulnerable contexts. Enhancing public health interventions to bolster health literacy should be prioritized to foster better dietary decision-making. Key messages • Health literacy plays an important role in the adoption of Mediterranean diet among adults from socially vulnerable contexts. • Implementing policies to aim the promotion of health literacy, particularly among individuals from socially vulnerable contexts are necessary.

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