Profile and patterns of dual use of e-cigarettes and combustible cigarettes among Mexican adults

espanolObjetivo. Describir el perfil de los usuarios duales y fumadores exclusivos, asi como los factores asociados con la frecuencia de uso de cigarro electronico. Material ymetodos. Se realizaron modelos logisticos de una encuesta en linea de fumadores adultos para estimar asociaciones de usuarios duales (fumador exclusivo vs. usuario dual) sobre variables sociodemograficas, tabaquismo y otras sustancias. Adicionalmente, mediante modelos binomiales censurados se evaluaron los factores asociados con la frecuencia de consu-mo de cigarro electronico. Resultados. Los usuarios duales fueron mas jovenes, con mayor educacion (AOR=2.22), tenian mayores niveles de dependencia de tabaquismo (AOR=1.31), preferirian usar cigarros con capsulas de sabor (AOR=1.58) y tuvieron una mayor proporcionde intentos de dejar de fumar (AOR=1.38).El consumo de marihuana y fumar diario se asocio con una mayor frecuencia de consumo de cigarro electronico. Conclusion. Eluso dual se asocio con un perfil de riesgo mas alto; este perfil es mas prominente en usuarios duales que usan cigarros electronicos con mayor frecuencia. EnglishObjective. To describe the profile and patterns of dual uses (n=954) and exclusive cigarette users (n=2 070) and determine the correlates of more frequent e-cigarette use among dual users and their reasons for e-cigarette use. Materials andmethods. An online survey of Mexican adult smokers. Logistic models regressed dual-use (exclusive smoking vs. dual user) on sociodemographic, smoking varia-bles and substance use behaviors. We conducted censorial binomial models to estimate the correlates of frequency of e-cigarette use among dual users. Results. Dual users were younger had higher education (AOR=2.22) and higher levels of smoking dependence (AOR=1.31), preferred cigarettes with flavor capsules (AOR=1.58) and had recently attempted to quit smoking (AOR=1.38). Marijuana use and being daily smokers were correlates of higher frequency of use among dual users. Conclusion. Dual users had a higher risk profile than exclusive smokers, which was even more prominent in dual-users who used e-cigarettes frequently.