The moderating role of anxiety sensitivity in terms of fatigue severity and e-cigarette use expectancies.

Little is understood about individual difference factors related to e-cigarette expectancies about use. This study examined the interactive effects of fatigue severity and anxiety sensitivity in relation to e-cigarette expectancies among 525 e-cigarette users (51.0% female, M _age  = 35.25 years, standard deviation = 10.10). Results indicated a significant interaction between fatigue severity and anxiety sensitivity in terms of positive expectancies ( β  = 0.57, p  < 0.001, 95% confidence interval = (0.002, 0.01)), but not for negative expectancies ( β  = 0.25, p  = 0.08, 95% confidence interval = (0, 0.005)) for e-cigarette use. These results support anxiety sensitivity as a moderator in the relation between fatigue severity and positive outcome expectancies for e-cigarette use.