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The purpose of this systematic review and meta-analysis is to provide an updated examination of the adolescent Dialectical Behavioral Therapy (DBT) literature and synthesize study findings across treatment settings (e.g. inpatient, outpatient, school), and treatment levels (e.g. clinical intervention, targeted, universal prevention). We also provide meta-analytic findings of the impact of DBT across key problem behaviors: depression, emotion dysregulation, suicidal and self-harm behaviors, externalizing problems, and eating disorders.

A reference database search was used to identify studies conducted on adolescent DBT interventions from 2000 through 2023 (N = 72). In addition to ensuring that the review process conformed to the PRISMA statement, we independently verified that each study met inclusion criteria before triple coding each article to examine variables of interest and extracted outcome data needed to conduct meta-analyses.

DBT appears to demonstrate effectiveness in improving mental health outcomes in adolescents across a range of psychiatric problems. To meet these treatment needs, DBT interventions have been appropriately adapted based on care setting, suggesting empirical support in inpatient, residential, partial hospitalization, and intensive outpatient programs, as well as in outpatient settings, juvenile correctional facilities, and schools.

The growing evidence base for adolescent DBT appears to reflect its promise and versatile clinical utility. Clinical implications and recommendations for future directions are discussed, including the need for more randomized controls and representation of diverse communities.

Self-poisoning is the most common form of hospitalised self-harm in young people and has been increasing over the last decade. The COVID-19 pandemic was associated with further increases in self-harm in adolescents. There are limited data on changes after pandemic restrictions ended. This study aimed to describe recent trends in self-poisoning in young people.

Australia 2018-2023.

A retrospective analysis of self-poisoning calls to Australia's poisons information centres. Intentional poisoning exposures in people aged 5-19 years were included in the main analysis. We also examined intentional poisonings in people aged 20 and over for comparison. We used interrupted time-series analysis to estimate the impact of COVID-19 (March 2020) and 're-opening' (December 2021), when many restrictions were lifted in Australia. We compared effects in the jurisdictions with most disruptions and lockdowns with other jurisdictions.

There were 201,755 self-poisonings documented, 64% female, with 19,946 children (aged 5-14, 9.9%) and 44,388 adolescents (aged 15-19, 22.0%). There was a steep increase in the rate of poisoning in female children and adolescents - with the annual increase being 1.361 (95% confidence interval = [1.074, 1.735]) and 1.154 (95% confidence interval = [1.049, 1.283]) times faster than pre-pandemic trends in these two groups between March 2020 and December 2021. Following relaxation of restrictions, there was a sudden drop and then slow decline in self-poisonings (despite rising COVID-19 infection rates). There was an overall 29.6% increase in intentional poisonings in young people over the study period. This is markedly more pronounced among young females (37.0%) vs males (11.2%). There were substantial jurisdictional variations, with larger increases in Victoria, Tasmania and the Australian Capital Territory.

There has been a marked increase in child and adolescent female self-poisonings over the last 6 years, with increases strongly associated with COVID-19 pandemic restrictions but persisting after their removal.

Regularly administering outcome measures, measurement-based care (MBC), informs clinical decision-making and improves youth mental health. Understanding predictors of high-fidelity MBC delivery helps ensure all youth can benefit from this evidence-based practice. Research on client and clinician predictors of MBC fidelity has mixed findings.

Participants included 53 clinicians and 115 adolescents from a randomized controlled effectiveness trial with MBC only and MBC + Unified Protocol for the Transdiagnostic Treatment of Emotional Disorders in Adolescents (UPA) conditions. Clients and clinicians reported demographic information. Clinicians completed broad- and narrow-band attitude measures. MBC fidelity was operationalized using the implementation index, combining rates of administering and viewing questionnaires, using objective MBC data.

The average MBC fidelity was 56.75% (SD = 30.36) and was significantly higher in the MBC only condition (M = 67.46%, SD = 27.63%) than in MBC + UPA condition (M = 46.58%, SD = 29.52%; p = .012). Clients identifying as White received significantly higher MBC fidelity than youth not identifying as White. Youth ethnicity, family income, age, severity, and number of sessions did not significantly predict MBC fidelity. Clinicians with less experience at their agency, less confidence, and who found manualized treatments less appealing, had significantly higher MBC fidelity than other clinicians. These results can inform future efforts to increase fidelity and equity in MBC delivery.