Longitudinal Association of Health Literacy with Parental Oral Health Behavior

BACKGROUND: Prior studies suggest that parents with limited health literacy (HL) may be less likely to engage in oral health practices known to protect children's oral health. Earlier work has relied on cross-sectional data, however, so it is unclear whether HL influences parental behavior or is merely correlated with it. OBJECTIVE: We sought to clarify the impact of HL on subsequent adherence to parental oral health practices. METHODS: This secondary analysis used survey data from a randomized controlled trial designed to reduce dental decay in American Indian children (N = 579). We used path analysis to test a theoretical framework developed to clarify the mechanisms through which HL might influence parental oral health behavior. The framework proposed that HL (1) has a direct effect on parental oral health knowledge, beliefs (i.e., self-efficacy, perceived susceptibility, perceived severity, perceived barriers, perceived benefits), and behavior; (2) has an indirect effect on beliefs through knowledge; and (3) has an indirect effect on behavior through knowledge and beliefs. To test expectations regarding the temporal precedence of the constructs, we examined the association of HL at baseline with knowledge at the 12-month time point, beliefs at 24 months, and behavior at 36 months. KEY RESULTS: HL had significant direct effects on knowledge and specific beliefs (i.e., self-efficacy, perceived susceptibility, perceived barriers), but not on behavior. HL had significant indirect effects on beliefs—except perceived susceptibility—through knowledge. HL had significant indirect effects on behavior, through knowledge and beliefs. Both HL and knowledge had significant total effects on subsequent parental oral health behavior. CONCLUSIONS: HL influenced behavior measured 3 years later through its impact on parental oral health knowledge and beliefs. Our results highlight the importance of addressing HL in development of oral health promotion efforts aimed at protecting the teeth of young Native children. [HLRP: Health Literacy Research and Practice. 2021;5(4):e333–e341.] PLAIN LANGUAGE SUMMARY: It is unclear whether HL influences how parents care for their children's teeth. We analyzed data from a project to reduce dental decay in children. We found that HL impacted parents' oral health knowledge, beliefs, and behavior at later points in time. This suggests that HL may influence development of knowledge and beliefs that support positive behavior.