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Health literacy and environmental health behaviors in the context of microplastic exposure: a cross-sectional study in rural Thailand
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A study of Thai villagers living along a river found that people who struggled to understand and act on health information were six times more likely to have poor habits for avoiding microplastic exposure, like eating fish frequently without precautions. This suggests that boosting health literacy—especially teaching people how to evaluate risks and take action—could be a practical way to help communities protect themselves from microplastic contamination in their water and food.
Microplastic contamination has emerged as a growing environmental exposure concern in river-dependent rural populations, yet evidence on behavioral determinants remains limited. Health literacy is a key upstream determinant that may influence risk perception and preventive behavioral responses. This study examined the association between health literacy and preventive behaviors related to microplastic exposure among residents living along the Mun River in Buriram Province, Thailand. A community-based cross-sectional study was conducted among 268 adults selected using multistage sampling. Data were collected through structured interviewer-administered questionnaires. Health literacy was operationalized as a multidimensional construct covering six domains and categorized into sufficient and insufficient levels. Preventive behaviors were dichotomized as good or poor based on predefined scoring criteria. Multivariable logistic regression models were applied to estimate adjusted associations between health literacy and preventive behaviors while controlling for potential confounders, including sociodemographic and behavioral factors. Adjusted odds ratios (AORs) with 95% confidence intervals (CIs) were reported. Insufficient health literacy was highly prevalent (70.9%) and was independently associated with poor preventive behaviors (AOR = 6.05, 95% CI: 3.08-11.90, p < 0.001) after adjustment for covariates. Domain-specific analysis identified action literacy (AOR = 2.67, 95% CI: 1.29-5.59, p = 0.008) and appraisal literacy (AOR = 3.19, 95% CI: 1.51-6.73, p = 0.002) as significant predictors. Frequent fish consumption was also independently associated with poor preventive behaviors (AOR = 3.25, 95% CI: 1.35-7.84, p = 0.009). Health literacy is a strong independent correlate of preventive behaviors related to microplastic exposure in rural riverine populations. Findings support targeted, domain-specific health literacy interventions-particularly action- and appraisal-oriented competencies-as a public health strategy to reduce environmental exposure risk.
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Researchers assessed health literacy and preventive behaviors related to microplastic contamination among communities living near major river basins in northeastern Thailand. They found that health literacy, particularly decision-making skills, was a critical factor in whether people adopted behaviors to reduce microplastic exposure. The study recommends integrating targeted literacy interventions into public health strategies for riverine communities.
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