“…A systematic review of 17 studies on youth in HICs found that flavored e-cigarettes were perceived as being less harmful, lower costs, more fashionable and enjoyable taste than combustible cigarettes (Romijnders et al, 2018). Prior research shows that youth e-cigarette use is associated with male sex (Barrington-Trimis et al, 2015;Jiang et al, 2016;Park et al, 2017;Robert Lourdes et al, 2019;Soteriades et al, 2020), residence in urban areas (Park et al, 2017), low academic achievement (Kinnunen et al, 2020), poor knowledge about the harm of smoking (Jiang et al, 2016), positive attitudes toward e-cigarettes (Barrington-Trimis et al, 2015;Bigwanto et al, 2019), history of cigarette smoking (Dautzenberg et al, 2015;Jiang et al, 2016;Park et al, 2017;Bigwanto et al, 2019;Robert Lourdes et al, 2019;Xiao et al, 2019;Kinnunen et al, 2020;Soteriades et al, 2020), and friends' (Barrington-Trimis et al, 2015;Dautzenberg et al, 2015;Park et al, 2017;Xiao et al, 2019) and family's members' smoking (Barrington-Trimis et al, 2015;Dautzenberg et al, 2015;Bigwanto et al, 2019;Kinnunen et al, 2020;Soteriades et al, 2020). However, there are few studies on youth e-cigarette use in low-and middleincome countries, especially in countries that e-cigarettes are banned (Thrasher et al, 2016;Zavala-Arciniega et al, 2018;Ofuchi et al, 2020).…”