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The link between engagement in non-suicidal self-injury (NSSI)–related activities on SNS (e.g. viewing, commenting, sharing and uploading NSSI content) with body image and NSSI behaviour remains under researched in adolescents with EDs. The main aim of the current research was to examine associations between NSSI-related activities on SNS with body image and NSSI behaviour severity among female adolescents diagnosed with an ED. A total of 52 female adolescents (mean age = 15.35 years, SD = 1.49) diagnosed with an ED completed self-report questionnaires related to NSSI behaviour, SNS usage and body image. Participants were divided into two groups: low NSSI behaviour severity (from 0 to 10 NSSI behaviours; n = 28) and high NSSI behaviour severity (more than ten NSSI behaviours; n = 24). Within the high NSSI severity group, individuals that comment and share NSSI online content significantly reported higher negative body image. A hierarchical binary logistic regression showed that the frequency of NSSI online content on SNS emerged as significant predictor of NSSI behaviour severity within last year after controlling for body image and searching for ED content on SNS. Our findings suggest that not only searching for ED content, but also being daily engaged in NSSI online activities may increase the risk of NSSI behaviour severity in female adolescents with EDs. [ABSTRACT FROM AUTHOR]

Introduction: Cannabis is the most widely used psychoactive substance among adolescents worldwide, and the age at which consumption begins to decrease. Cannabis use in adolescents is associated with a wide range of adverse consequences in adulthood including increased vulnerability to psychosis and other mental disorders, as well as suicidal ideation and attempt. The aim of this study is to extend understanding of the link between cannabis use and mental illness by examining whether cannabis use at early ages predicts transdiagnostic variables that are precursors to severe clinical diagnoses. Methods: A descriptive cross-sectional study was conducted. The sample was made up of 605 adolescents from 7th to 9th grades, with a mean age of 13.2 years (SD = 1.0, 47% girls). The variables evaluated were: anomalous perception of reality, intolerance of uncertainty, rumination, suicide attempt, hopelessness, and symptoms of depression and anxiety. The administration of the questionnaires was carried out in groups of 20 participants under the supervision of a researcher in a unique session of 1 hour. Results: Adolescent cannabis users scored higher on all variables assessed: anomalous perception of reality (Cohen's d =.60), rumination (d =.48), intolerance of uncertainty (d =.11), suicidal attempt (affirmative answer: 25.9% of users vs 7.7% of non-users), hopelessness (d =.85), symptoms of depression (d =.80), and anxiety (d =.39). A binary logistic regression showed that the only variable uniquely related to cannabis use was hopelessness (Wald = 4.560, OR: 1.159, p =.033). Conclusions: Among some mental health risk factors, hopelessness appears uniquely related to cannabis use. Adolescents may use cannabis as a coping strategy for negative thoughts and emotions, or it may be a consequence of cannabis use. Future prevention programs should focus on preventing/treating modifiable factors such as hopelessness, and delaying cannabis use in specific subgroups of adolescents who experience pathologies such as depression or suicide attempts. [ABSTRACT FROM AUTHOR]