Abstract
Epidemiologists are increasingly concerned about public understanding of heart disease and how that understanding is influenced by exposure to media messages. Using cohort data from a multicity health campaign project, this study examines the extent to which exposure to health promotion messages can influence public understanding of heart disease. Our analysis suggests that exposure to mediated health messages can influence at least two aspects of understanding: breadth and depth of what people know about heart disease. We also found that increases in understanding are enhanced by certain aspects of involvement, particularly the belief that lifestyle can affect one's chances of heart disease.
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