Prevention of Mental Disorders: Promises, Limitations, and Barriers

Indicated prevention interventions for anxiety in children and adolescents: a review and meta-analysis of school-based programs

Anxiety disorders are among the most common youth mental health disorders. Early intervention can reduce elevated anxiety symptoms. School-based interventions exist but it is unclear how effective targeted approaches are for reducing symptoms of anxiety. This review and meta-analysis aimed to determine the effectiveness of school-based indicated interventions for symptomatic children and adolescents. The study was registered with PROSPERO [CRD42018087628]. We searched MEDLINE, EMBASE, PsycINFO, and the Cochrane Library for randomised-controlled trials comparing indicated programs for child and adolescent (5-18 years) anxiety to active or inactive control groups. Data were extracted from papers up to December 2019. The primary outcome was efficacy (mean change in anxiety symptom scores). Sub-group and sensitivity analyses explored intervention intensity and control type. We identified 20 studies with 2076 participants. Eighteen studies were suitable for meta-analysis. A small positive effect was found for indicated programs compared to controls on self-reported anxiety symptoms at post-test (g = - 0.28, CI = - 0.50, - 0.05, k = 18). This benefit was maintained at 6 (g = - 0.35, CI = - 0.58, - 0.13, k = 9) and 12 months (g = - 0.24, CI = - 0.48, 0.00, k = 4). Based on two studies, > 12 month effects were very small (g = - 0.01, CI = - 0.38, 0.36). No differences were found based on intervention intensity or control type. Risk of bias and variability between studies was high (I² = 78%). Findings show that school-based indicated programs for child and adolescent anxiety can produce small beneficial effects, enduring for up to 12 months. Future studies should include long-term diagnostic assessments.

Differential treatment response trajectories in individuals with subclinical and clinical PTSD

Subclinical presentations of posttraumatic stress disorder (PTSD), wherein patients are one or two symptom criteria short of the full disorder, are prevalent and associated with levels of distress and impaired functioning approximating that of full PTSD. Nonetheless, research examining treatment efficacy for this group is in the nascent stage. The purpose of the present study was to examine whether the subclinical PTSD group would: (1) show a greater reduction in PTSD symptoms at pre and post treatment in response to an exposure based treatment and (2) show a greater rate of change over the course of treatment, when compared to the full criteria PTSD group. We also examined whether differences would emerge when examining PTSD symptom clusters. Consistent with predictions, the subclinical PTSD group demonstrated a greater reduction in PTSD symptoms at post-treatment (29%) than those with a PTSD diagnosis (14%). Further, the groups had different treatment trajectories, with the subclinical PTSD group showing a marginally greater rate of change during the course of treatment. Findings also varied by symptom cluster with the subclinical group showing a greater rate of change in the intrusions, hypervigilance, and avoidance symptom clusters. There was not a significant between group difference in the numbing symptom cluster. This study provides preliminary evidence that treating PTSD symptoms at the subclinical level may result in a larger, and more rapid symptom reduction, and thus has implications supporting treatment earlier in the developmental trajectory of the disorder.

Prevention of anxiety disorders

Research into the prevention of anxiety has increased dramatically in the past few years. Prevention programs have been directed at broad, nonspecific anxiety and at more specific anxiety types, such as panic disorder and post-traumatic stress disorder. Prevention of anxiety is still a relatively new field, but there has been a recent surge of literature reporting on different prevention programs. Universal prevention trials have shown modest but promising results, and school-based programs offered to all students also help to reduce stigmatization and common barriers to accessing treatment (eg, time, location, and cost). In contrast, targeted programs tend to show somewhat larger effects but rely on identification of relevant populations. Specific programs for the prevention of panic disorder and post-traumatic stress disorder have also demonstrated some preliminary success. This paper reviews the recent studies of prevention of anxiety and discusses several key issues, specifically (1) identification of at-risk participants for prevention programs, (2) motivation for participation, (3) optimal age for intervention, and (4) who should deliver the program.

Developmental phenotypes and causal pathways in attention deficit/hyperactivity disorder: potential targets for early intervention?

Early intervention approaches have rarely been implemented for the prevention of attention deficit/hyperactivity disorder (ADHD). In this paper we explore whether such an approach may represent an important new direction for therapeutic innovation. We propose that such an approach is most likely to be of value when grounded in and informed by developmental models of the dynamic, complex and heterogeneous nature of the condition. First, we set out a rationale for early intervention grounded in the science of ADHD viewed through developmental models. Second, we re-examine the concept of disorder-onset from the perspective of developmental trajectories and phenotypes. Third, we examine potential causal pathways to ADHD with regard to originating risk, pathophysiological mediators, environmental moderators and developmental continuities. Finally, we explore the potential value of strategies for identifying young children at risk for ADHD, and implementing interventions in ways that can target these underlying pathogenic processes. The utility of such an approach represents an important area for future research but still requires 'proof of concept'. Therefore prior to widespread clinical implementation, far greater knowledge is required of (i) developmental pathways into ADHD, (ii) the value of identifying neuropsychological mediators of these pathways, and (iii) the extent to which targeting mediating mechanisms will improve treatment outcomes for children with ADHD.

Early adolescents' perceptions of their mother's anxious parenting as a predictor of anxiety symptoms 12 months later

Parental overprotection and modeling of fearful behaviors have been proposed to play a central role in the development of anxiety. Yet there have been few longitudinal examinations of these relationships and virtually none focusing on the adolescent period. The current study measured adolescent perceptions of maternal anxious parenting (a combination of overprotection and expression of anxiety), mothers' levels of anxiousness, and adolescents' anxiety symptoms in 421 girls in grade 7 and their mothers. Measures were repeated 12 months later. When the adolescent's self report of anxiety was used as the outcome, the adolescent's perception of maternal anxious parenting significantly predicted adolescent anxiety 12 months later. When the mother's report of adolescent anxiety was used as the outcome adolescent anxiety significantly predicted adolescent perceptions of maternal anxious parenting 12 months later. Maternal anxiousness predicted the adolescent's perception of anxious parenting, but meditational relationships were not significant in either model. The data are partly consistent with reciprocal influence models of parent/child relationships but point to the importance of informant perspectives in determining relationships between these complex variables.