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BACKGROUND: Although percentage risk formats are commonly used to convey cardiovascular disease (CVD) risk, people find it difficult to understand these representations. AIMS: To compare the impact of providing a CVD risk message in either a traditional format (% risk) or using an analogy of risk (Heart-Age) on participants' risk perceptions and intention to make lifestyle changes. METHODS: Four hundred and thirteen men and women were randomly allocated to one of two conditions; CVD risk as a percentage or as a Heart-Age score (a cardiovascular risk adjusted age). RESULTS: There was a graded relationship between perceived and actual CVD risk only in those participants receiving a Heart-Age message (P<0.05). Heart-Age was more emotionally impactful in younger individuals at higher actual CVD risk (P<0.01). Self-reported emotional reactions further mediated the relationship between risk perception and intention to make lifestyle changes. CONCLUSION: This study found that the Heart-Age message significantly differed from percentage CVD risk score in risk perceptions and was more emotionally impactful in those participants at higher actual CVD risk levels.
Soureti et al. (Thu,) studied this question.