Adolescence is a time when multiple health risk behaviours begin (El Achhab et al., 2016). The most common health risk behaviours include smoking, drinking and drug use (Dowdell et al., 2011), and it has been reported that approximately 80% of adults who smoke or drink begin such behaviours in adolescence (Hale & Viner, 2016;Kristjansson, 2010). Smoking and drinking in adolescence is not only a threat to physical health but also leads to negative, long-term effects on cognitive development (Brown et al., 2000;Solowji et al., 2011), and sexual intercourse in adolescence may be a potential risk factor for health and adaptation in adulthood (Choi et al., 2017). Moreover, the highest incidence rate of sexually transmitted infections (STIs) is found in adolescents and early adults aged 14-24, according to the recent report by Centers for Disease Control and Prevention (CDC, 2019), and earlier experiences with sexual intercourse are associated with higher risk of STI (KCDC, 2018). In 2001.3% of adolescents aged 9-12 experienced sexual intercourse with multiple partners, and 7.7% of them smoked or other weak drugs (KCDC, 2018).These results show that health-related problems of adolescents are