Background and aims: This on-line experiment examined whether the addition of ingredient- or industry-themed warning statements in television advertisements for e-cigarettes would affect young adults' craving for and risk perceptions of e-cigarettes and combustible cigarettes, as well as intent to purchase e-cigarettes.
Design: Advertisements for two leading e-cigarette brands were edited to contain a warning statement about product ingredients or about the tobacco industry. Participants were assigned randomly to one of eight treatments or one of two brand-specific control conditions without any warning statement.
Participants: Young adults (n=900, aged 18-34 years) in a web panel were recruited from three groups: recent e-cigarette users, current smokers who used combustible cigarettes exclusively and non-users of either product.
Measurements: Craving and risk perceptions (addictiveness, harmful to health in general, harmful to others) were measured separately for e-cigarettes and combustible cigarettes. The Juster scale measured intention to purchase e-cigarettes.
Findings: Exposure to both types of warnings was associated with lower craving for e-cigarettes among e-cigarette users and smokers who experienced any craving (P<0.01) and lower intention to purchase among all participants (P<0.001). Only exposure to ingredient-themed warnings was associated with lower craving for combustible cigarettes (P<0.05). Participants who saw industry-themed warnings reported greater perceptions of general harm (P<0.001), but also rated e-cigarettes as less addictive than the control conditions (P<0.05).
Conclusion: The addition of ingredient- or industry-themed warning statements to e-cigarette television advertising similarly reduces craving and purchase intent for e-cigarettes, but has inconsistent effects on perceived risks.
Keywords: Advertising; craving; e-cigarettes; intention to purchase; perceived risk; warning labels.
© 2015 Society for the Study of Addiction.