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Mobile phone use after lights out may be associated with poor mental health, suicidal feelings, and self-injury in both early and late adolescents. Association between reduced sleep and the mobile phone use was confined to early adolescents.

Background Video game loot boxes, which can typically be purchased by players or are given as reward, contain random virtual items, or loot, ranging from simple customization options for a player's avatar or character, to game-changing equipment such as weapons and armor. Loot boxes have drawn concern, as purchasing loot boxes might lead to the development of problematic gambling for adolescents. Although parental problem gambling is associated with adolescent problem gambling, no studies have evaluated the prevalence of loot box purchases in adolescents’ parents. Objective This study investigated the association between loot box purchasing among adolescents and parents, and problem online gaming in population-based samples. Methods In total, 1615 adolescent (aged 14 years) gamers from Japan responded to a questionnaire regarding their loot box purchasing and problem online gaming behaviors. Problem online gaming was defined as four or more of the nine addictive behaviors from the Diagnostic and Statistical Manual of Mental Disorders. The adolescents’ primary caregivers were asked about their loot box purchasing. Results Of the 1615 participants, 57 (3.5%) reported loot box purchasing. This prevalence did not differ according to primary caregivers’ loot box purchasing, but adolescents who purchased loot boxes were significantly more likely to exhibit problem online gaming (odds ratio 3.75, 95% CI 2.17-6.48). Conclusions Adolescent loot box purchasing is linked to problem online gaming, but not with parents’ loot box purchasing. Measures to reduce these behaviors should target reducing addictive symptoms in young video gamers.

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PfS was associated with increased odds of SI and SH in adolescents. No interaction effect between PfS and social isolation on SI and SH was found, but adolescents with PfS and social isolation had the highest risk for SI and SH. Parents and professionals should pay attention to suicide risk in adolescents with PfS.

Aims: Improving knowledge and beliefs about mental health (or mental health literacy [MHL]) may promote appropriate help-seeking by adolescents who are suffering from mental health problems. We developed a concise, school-staff-led MHL program and examined its effects. Methods:The participants comprised 118 grade-9 students (61 boys and 57 girls). The program consisted of two 50-min sessions, and was given by a schoolteacher. The effects of the program were evaluated before, immediately after and 3 months after the program, using a self-report questionnaire.Results: Knowledge of mental health/illnesses and desirable behavior for help-seeking were significantly improved immediately after (post-test, P < 0.001, and P < 0.001, respectively) and 3 months after the program (3-month follow up, P < 0.001 and P < 0.001, respectively), compared with the test before the delivery of the program (pre-test, Wilcoxon signed rank test). Proportions of the correct diagnoses of vignette cases of major depression and schizophrenia were significantly (P < 0.001) elevated from 38.3% and 19.1% (pre-test) to 94.7% and 93.6% (post-test), and 91.5% and 86.2% (3-month follow up). Intentions to seek help and to provide peers with help with mental health problems were also significantly (P < 0.001) elevated at post-test and at 3 months compared with the pre-test. Conclusions:A concise, school-staff-led program may have a significant effect on the improvement of MHL in secondary school students.

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