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Purpose: sexual permissiveness, sexual behaviors and the consumption of mass media in female high school students. Methods: 306 students, from three different girls' high schools in Seoul, who understood the purpose of the study, participated as subjects in the research. The research tools were the mass-media consumption scale, the sexual attitudes survey, the sexual permissiveness survey, and the sexual behaviors scale. The data were analyzed using descriptive analysis, t-test, ANOVA with SPSS/WIN. 18.0 program. Results: The subjects' daily mass media consumption was 143.7 minutes of TV watching on weekdays, while 253.9 minutes on weekends, 88.5 minutes of Internet surfing, 57.8 minutes of listening to pop music. Watching TV music programs was 68.3 minutes a week. Watching TV 'alone' was 30.7% and Internet surfing in one's 'own room' was the highest at 39.9%. The average score of sexual attitudes, sexual permissiveness, and sexual behaviors was 25.7/55, 35.4/64 and 0.7/10, respectively. Sexual attitudes and sexual permissiveness varied according to how much time they spent surfing the Internet, with whom they watched TV, and how much time they spent listening to popular music; and sexual behavior differed according to the time spent on the Internet. Conclusion: Educational programs need to be developed to help young people control their media consumption behaviors. In addition, political attention and a proper system are needed to promote a healthier and sounder pop culture through a public review system.

Purpose: The purpose of this study was to investigate the effects of secondhand smoke on depression and suicidal ideation in adolescents. Methods: The study used the raw data of the Korea Youth Risk Behavior Web-based Survey (2018). Age, academic achievement, living with family, economic status, and stress were adjusted and the relationship between secondhand smoke and depression and suicidal thoughts was analyzed by gender. Results: The results showed that secondhand smoke had a significant effect on mental health of adolescents. Male students who experienced secondhand smoke at school and at public places had 1.41 times and 1.37 times higher depression rates, respectively. Female students who experienced secondhand smoke at home, school, and public places had 1.27 times, 1.35 times, and 1.39 times higher depression rates, respectively. Suicidal thoughts were 1.17 times and 1.22 times higher among male students who experienced secondhand smoke at school and at public places. Female students who experienced secondhand smoke at home, school, and public places had 1.12 times, 1.08 times, and 1.21 times more suicidal thoughts. Conclusion: Secondhand smoke has a significant effect on adolescent depression and suicidal thoughts. Therefore, efforts should be made to have institutional changes and increased awareness across the country, such as homes, schools, and communities, to prevent exposure to secondhand smoke.

Purpose: This study is to confirm the effectiveness of the character education program applied to high school students. Methods: The study used a one-group pretest-posttest design with a sample of students aged 15 (n=263, male), the members of eleven 10th grade classes in a high school in Seoul, from March 1st, 2019 to February 28th, 2020. In order to confirm the effectiveness of the program, the Korean Educational Development Institute (KEDI) character questionnaire was used, and a paired t-test was performed using IBM SPSS statistics 25 statistical program. Results: In this study, character levels were significantly higher after the character education program than before. The pre-post differences in character levels were measured for Sincerity (t=5.63, p<.001), Selfrespect (t=2.78, p=.011), Decorum (t=3.97, p<.001), Responsibility (t=5.35, p<.001), Consideration and communication (t=5.89, p<.001), Citizenship (t=5.28, p=p<.001), Self-regulation (t=6.25, p<.001), Justice (t=2.62, p=.011), Wisdom (t=5.75, p<.001), and Honesty and courage (t=7.11, p<.001). Conclusion: In this study, <Judo lessons> and <Theatrical lessons> were found to be significantly related to improvements in character.

Purpose: This study aimed to identify the prevalence of alcohol and cigarette use and assess its relationship with socio-environmental, psychological, violent and behavioral factors among a sample of high school students from Lima and Callao, Peru. Methods: We utilized the data from a cross-sectional study conducted by the Yonsei Global Health Center in collaboration with the Korea International Cooperation Agency (KOICA) Peru office in November 2016. The total sample size of this study was 1,477 students. For analysis, we used bivariate and multivariate logistic regression to calculate the unadjusted and adjusted odds ratios and their respective 95% confidence intervals. Results: The current prevalence of alcohol and cigarette use among adolescents was found to be 24.2% and 12.1%, respectively. Alcohol use was affected by age, friends' alcohol use, experience of physical fighting, and involvement in other risk behaviors (smoking, drug use, and sexual intercourse). Cigarette use was affected by perceived academic performance, friends' cigarette use, and involvement in other risk behaviors (drinking, drug use, and sexual intercourse). Furthermore, students who received affection from their parents and whose parents monitored their activities were less likely to report using both alcohol and cigarettes. Conclusion: Alcohol and cigarette use among Lima and Callao adolescents is affected by socio-environmental, violent and behavioral factors. Alcohol and cigarette use prevention initiatives should promote positive parenting practices, family togetherness, and a supportive school climate. In addition, it is needed to establish peer-led programs that promote behavioral changes in students and strengthen social relations without the presence of alcohol, cigarettes, and other harmful substances.

Purpose: The purpose of this study was to compare unsafe sex experiences of multicultural and non-multicultural adolescents. Methods: The study analyzed the data of 3,029 respondents who responded that they had sex in the Korea Youth Risk Behavior Web-Based Survey of 2018. Weighted percentages and simple and multiple logistic regression were conducted using SAS 9.2. Results: As a result of univariate analysis, the odds ratio of unsafe sex was significantly higher in multicultural adolescents, but the difference between the two groups was not significant after controlling for the related variables. Among the covariates, the odds of unsafe sex were significantly higher in boys (AOR: 1.34; 95% CI: 1.08~1.66), those who did not live with their family (AOR: 1.68; 95% CI: 1.17~2.39), those with low academic achievement (AOR: 1.33; 95% CI: 1.02~1.73), binge drinkers (AOR: 1.61; 95% CI: 1.29~2.02), smokers (AOR: 1.37; 95% CI: 1.06~1.78), and those who did not receive sex education (AOR: 1.59; 95% CI: 1.20~2.11). Conclusion: There was no significant difference in unsafe sex experience between multicultural and non-multicultural adolescents. This study also shows the positive effect of school sex education on safe sex in teenagers. It is necessary to strengthen sex education for male students, students not living with their family, students with low academic achievement, binge drinkers, and smokers.

Purpose: The purpose of this study is to identify the relationship between perceived smartphone addiction and physical and mental health among female college students. Methods: Data were collected using a questionnaire to measure perceived smartphone addiction and physical and mental health of 314 female students attending a college located in D city from April 9 to May, 31, 2019. The collected data were analyzed using descriptive statistics, x2 test, t-test and stepwise multiple regression with SPSS 18. Results: The respondents were classified into two groups, the perceived smartphone addiction group (29.3%) and the perceived smartphone non-addiction group (70.7%). Perceived smartphone addiction was significantly different according to daily smartphone usage time (p<.001), smartphone usage fee (p=.005), most satisfying thing about using smartphones (p=.006) and importance of smartphones in daily life (p<.001). The perceived smartphone addiction group had more physical health problems (p=.001) and more mental health problems (p<.001). The factors affecting physical health were perceived smartphone addiction and importance of smartphones in daily life, with 62% of explanatory power (F=10.15, p<.001). As for mental health, the affecting factors were also perceived smartphone addiction and importance of smartphones in daily life, with 87% of explanatory power (F=14.52, p<.001). Conclusion: It is important to raise awareness of smartphone addiction including its negative impact on physical and mental health, reduce smartphone usage time, and build offline social relationships.

Purpose: HPV vaccination is important for the prevention of cervical cancer and genital warts and it is recommended that females be vaccinated against HPV before having sexual contact. Although the national HPV immunization has recently started in Korea, the vaccination rate is still not high. This is a relevant study attempting to investigate the factors affecting the vaccination status of female adolescents in the target age groups focusing on mothers' knowledge and health beliefs of HPV vaccines. Methods: Participants were 206 mothers who had daughters at the target age for the national HPV vaccination program living in a metropolitan city. Data were collected using a self-reported questionnaire about HPV knowledge and health beliefs of HPV vaccines, consisting of perceived susceptibility seriousness, benefits, barriers, and cues to action. Results: The participants’ knowledge of HPV was significantly correlated with the overall health beliefs. The factors influencing mothers regarding the HPV vaccination status of their adolescent daughters were found to be perceived barriers, advice on vaccination from medical staff, and perceived benefits. Conclusion: There is a need to organize subject-specific education programs focusing on correcting misinformation about the side effects and benefits of HPV vaccines. When operating education programs, it is recommended that participants include both students and their parents, that various approaches be implemented such as formal health classes, home correspondence and online education, and that medical personnel be also involved as education providers.