Do sociodemographic factors influence the levels of health and oral literacy? A cross-sectional study

Background Oral health literacy has gained importance in dental literature, and its relationship with oral health status and association with health status (HL) has been reported. Then, an association between the levels of HL and OHL could be expected. This study aimed to assess the levels of HL and OHL according to sociodemographic factors and to explore a possible association between HL and OHL. Methods The European Health Literacy Survey and Oral Health Literacy Adults Questionnaire were applied to a convenience sample from Portuguese individuals. Also, sociodemographic factors such as sex, age, schooling level of the participants and their parents, and if the participants were professionals or students of the health field were assessed. To analyze the data, the Kruskal–Wallis and Mann–Whitney U tests were used to compared sociodemographic variables and the levels of literacy in general and oral health. The Spearman correlation test assessed the correlation between the levels of HL and OHL. Results HL results showed that 45.1% of the volunteers were considered in a “problematic level” and 10.3% in “excellent level”. However, 75% presented an adequate level of OHL. Regarding the levels of HL in each sociodemographic variable, significant higher levels of “excellent level” were found in health professionals and students when compared with participants not related to health area ( p < 0.001). Comparisons between the levels of OHL in each sociodemographic variable showed, significant differences regarding sex ( p < 0.05), age ( p < 0.001), levels of schooling of the participants and their parents ( p < 0.009 and p < 0.001) and relationship with health field. ( p < 0.001). A significant positive – weak correlation was found between HL and OHL ( p < 0.001). Conclusions HL and OHL levels are associated and could be influenced by sociodemographic factors.