%0 Journal Article %T A theory %A Andrew Pleasant %A Caitlin Maish %A Catina O¡¯Leary %A Richard H Carmona %J Methodological Innovations %@ 2059-7991 %D 2018 %R 10.1177/2059799118814394 %X We set out to test a theory-based measure of health literacy. To do so, we included the newly developed Calgary Charter on Health Literacy scale in Pre- and Post-evaluation of the Life Enhancement Program at multiple sites. The program focusing on health literacy and the prevention of chronic disease is conducted with health-care provider organization partners across the United States. In testing the reliability and validity of the new measure of health literacy, Cronbach¡¯s alpha is very acceptable level at 0.80. There are numerous statistically significant correlations between the change in health literacy and participants¡¯ changes in knowledge, attitudes, beliefs, behaviors, and health status. Data and analysis indicate that the Calgary Charter on Health Literacy Scale is a valid and reliable measurement tool in the contexts and with the populations they were tested within. More testing is necessary and warranted in a wider variety of contexts and populations¡ªideally to include large representative random samples and comparison groups. We recommend that policymakers increase focus on advancing health literacy as an evidence-based approach to reach the goals of improved individual and public health at a lower cost %K Health literacy %K measurement %K prevention %U https://journals.sagepub.com/doi/full/10.1177/2059799118814394