Pathways of socioeconomic inequalities in self-perceived oral health

Although there is a large body of evidence of the influence of social determinants on oral health, information on the mechanisms by which these determinants operate is poorly documented. Therefore, we aimed to investigate the pathways through which socioeconomic inequalities may influence self-perceived oral health (SPOH) in Brazilian adults. This cross-sectional study used data from the National Health Survey (NHS) of 2019, with a representative sample of adults aged 18 to 59 years (n = 65,803). The outcome was SPOH, assessed by a global self-item. Structural equation modeling was used to test direct and indirect pathways connecting a latent variable for socioeconomic position (SEP) to SPOH via psychosocial, behavioral, and biological factors. Higher SEP was directly associated with better SPOH [standardized coefficient (SC) = 0.069; p < 0.01)] fewer depressive symptoms (SC = -0.059; p < 0.01), fewer missing teeth (SC = 0.131; p < 0.01), and more healthy behaviors (SC = 0.643; p < 0.01). Fewer depressive symptoms (SC = -0.141; p < 0.01), more healthy behaviors (SC = 0.242; p < 0.01), and fewer missing teeth (SC = 0.058; p < 0.01) were directly associated with good SPOH. Among specific indirect effects of SEP on SPOH, the behavioral pathway was the one that best explained this association (SC = 0.155). Socioeconomic inequities in SPOH are mediate by psychosocial, behavioral, and biological factors. This has implications for positioning health strategies in the social context in which people live, to facilitate healthy choices and promote good oral health.