Low Health Literacy Is Associated With Risk of Developing Type 2 Diabetes in a Nonclinical Population

The purpose of this study was to examine associations among risk of type 2 diabetes (T2D), health literacy levels, and sociodemographic characteristics in a nonclinical adult population to assist in the development of effective T2D prevention programs.

The Health Literacy Questionnaire and Australian Type 2 Diabetes Risk Assessment Tool were included in an online survey. Participants were a random sample of adults residing in each Australian state and territory. Data were analyzed with descriptive statistics and multinomial logistic regression.

A total of 1279 Australian adults participated (52% female; mean ± SD age, 61 ± 12 years). Most were at medium (42.4%) or high (46.9%) risk of developing T2D. The lowest health literacy scores were found for the domains "critical appraisal of health information" and "navigating the health care system." After controlling for covariates, participants at the highest risk of developing T2D were significantly more likely to be unemployed, have ≥1 chronic conditions, or have a mental health condition. Furthermore, they were significantly more likely to develop T2D if they scored low in 1 of the following health literacy domains: critical appraisal of health information, navigating the health care system, actively managing health, social support, and health care provider support.

Health literacy was associated with increased risk for developing T2D and should therefore be part of diabetes prevention initiatives. Specifically, new health promotion initiatives need to help people develop skills required to critically appraise health information and navigate the health care system. Health practitioners and educators should ensure that health information developed for consumers is uncomplicated and easily understood.