“…Previous studies exploring predictors related to heavy drinking among adolescents in various countries have identified a number of predictors, including differences by gender (Iwamoto et al, 2016), school grade (Chung & Joung, 2013;Larsen et al, 2017), bullying victimization (Wang et al, 2018), depression (Lamis, Ballard, May, & Dvorak, 2016), sleep quality (Hasler et al, 2017), exercise (Chung & Joung, 2018), current cigarette smoking (Chung & Joung, 2013), and sexual experience (Wang et al, 2018). Although these demographic characteristics and health and risk behaviors are often related or co-occurring, most of the preceding studies have studied only one concept, or have been studied only in the adolescents of one country (Chung & Joung, 2013), or have been conducted in other countries, such as US (Chung & Joung, 2018;Iwamoto et al, 2016).…”