Centre for Youth Mental Health - Theses
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ItemPsychological Interventions for Interpersonal Trauma in Young People with symptoms of Posttraumatic Stress, Anxiety and Depression( 2022-08)Worldwide exposure to potentially traumatic events is highly prevalent among young people aged 12 to 25 years, with international data indicating that approximately two-thirds of adolescents experience exposure to a traumatic event before age 16. In addition to interpersonal trauma inflicted by a caregiver, such as abuse (sexual, physical, and emotional), neglect, and maltreatment, young people are often exposed to family violence, physically assaulted or intimidated by siblings or peers, and are bullied. Unfortunately, subsequent exposure to a different interpersonal trauma type is not uncommon, with nearly 65% of young people experiencing multiple exposures once exposed to one interpersonal trauma. Exposure to interpersonal trauma during this developmentally sensitive period is associated with pervasive and long-lasting psychological, physical, behavioural, social, and economic costs accounting for between 28% and 45% of the population attributable risk for the early onset of youth psychological disorders. In addition to posttraumatic stress, anxiety, depression, problematic substance use, emotional dysregulation, lack of impulse control, poor interpersonal relationships, dissociation, as well as attention and cognition, dysfunctions are highly prevalent and associated with increased incidents of self-harming behaviours and suicidal thoughts and behaviours. Although evidence-based interventions and guideline recommendations exist for the treatment of PTSD in children/adolescents and adults, none of the recommended interventions has been developmentally adapted for transitional-aged youth aged 15 to 25 years exposed to interpersonal trauma, and it remains unclear what the most effective and safe treatment is for these young people. This thesis sought to address this significant gap in the literature with the ultimate aim of evaluating the evidence for psychological interventions for posttraumatic stress disorder (PTSD) and comorbidities in young people exposed to interpersonal trauma and understanding if trauma-focused cognitive behavioural therapy ([TF-CBT]; Cohen et al., 2017), specifically are potentially suitable for this group of young people. The research reported in this thesis had three main aims. Aim 1: To collect, interpret and synthesise quantitative research about the efficacy of psychological interventions for treating anxiety, depression, and substance use in addition to posttraumatic stress symptoms in young people exposed to interpersonal trauma. Aim 2: To understand if trauma-focused cognitive behavioural therapy (TF-CBT) is feasible, acceptable, and potentially clinically effective for young people impacted by interpersonal trauma and symptoms of posttraumatic stress disorder (PTSD). Aim 3: To understand if TF-CBT is safe and tolerable, with a specific focus on determining whether the exposure component of TF-CBT (known as trauma narration) is associated with an elevation in distress or an increase in self-harming behaviours or suicidal thoughts and behaviours. Three studies were conducted to address these aims. Study 1: To achieve the first aim, Study 1 used a meta-analytical approach to evaluate the efficacy of psychological interventions in reducing PTSD, anxiety, depression, and substance use symptoms in young people exposed to interpersonal trauma. Until now, the largest meta-analysis of young people is the study conducted by Gutermann et al. (2016). Unfortunately, the results of this study were affected by incomplete age-data (i.e., no mean age or age range) and poorly reported trauma data (i.e., reported mixed types, not specific types). I was interested in overcoming these two issues in order to provide specific evidence of treatment effects for young people (aged 12–25 years) and those exposed to a wide range of interpersonal trauma types (i.e., beyond physical and sexual abuse). Therefore, I conducted a new review, selecting only those studies where participants’ mean age fell between 12 and 25 years, with at least 80% of the sample exposed to one or more interpersonal traumas. Large significant effect sizes were observed for psychological interventions versus controls for outcomes of PTSD, and there were small significant effect sizes for anxiety and small trend-level non-significant effect sizes for depression. TF-CBT outperformed other treatments in the sub-group analysis for PTSD. However, results need to be interpreted within the context of the small sample size and heterogeneity. Study 2: To achieve the second aim, Study 2 employed a single-arm pre vs post study design, with two additional assessment points at the start and end of the trauma narration phase of TF-CBT for transitional-aged young people aged 15- 25. The sample included 20 young people (65% female, n = 13) who participated in up to 20 sessions of TF-CBT over 30 weeks. Two female participants dropped out of treatment (one after the first session and the other before the start of trauma narration. The remaining participants attended a mean of 15 sessions of TF-CBT over 25 weeks. TF-CBT was implemented with fidelity, and young people reported that they would recommend the intervention to a friend experiencing a similar issue. Quantitative data supported the relative clinical efficacy of TF-CBT. At the end of treatment, only one of the 16 participants with a baseline PTSD diagnosis met the diagnostic criteria. Significant improvements were also noted in self-reported PTSD, anxiety, and depression outcomes. Study 3: To achieve the third aim, distress, self-harm and suicide from Study 2 were analysed and interrogated to investigate if TF-CBT was safe and tolerable. The young people enrolled in Study 2 completed the Subjective Units of Distress Scale (SUDS) at the start and end of each session and were also asked question 6 of the C-SSRS, which inquired about their suicidal thoughts and behaviours in the week between therapy sessions. In addition, data from the Deliberate Self Harm Inventory (DSHI) and Adult Suicide Ideation Questionnaire (ASIQ) were also analysed. Across the 279 sessions of TF-CBT (M = 15.5 sessions), there were 16 incidents of elevated distress in seven participants, 15 incidents of self-harming behaviour in seven participants, and one of both elevated distress and suicide ideation. Results indicated there might be a relationship between distress and self-harming behaviours. Conclusion: This thesis used quantitative methods to understand the relative efficacy of psychological interventions for PTSD, anxiety, and depression in transitional-aged young people exposed to interpersonal trauma. The results of the meta-analysis and data from the pilot study demonstrated the potential safety and efficacy of TF-CBT for transitional-aged young people. This new knowledge is timely given the expansion in specialised mental health service delivery and the need to better accommodate the needs of transitional-aged young people with a history of trauma exposure.
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ItemCharacteristics and Predictors of Suicidality in Young People with Depressive Disorders( 2023)Depression is one of the most prevalent and disabling mental health conditions among young people worldwide. Suicidality and depression are closely intertwined, yet the specific factors that contribute to the nature and severity of suicidality, or changes in suicidality over time, are not perfectly understood. Factors other than depressive symptom severity, such as comorbid psychopathology and personality traits, might be important contributors. In order to reduce the burden of suicidality in young people with depression, we need to improve our understanding of its underlying constructs and contributory elements. This has the potential to contribute to improved prevention and early intervention efforts across multiple stages of suicidality, in addition to informing more targeted clinical treatment approaches. Aims and Objectives The broad aim of this research program was to contribute towards an improved understanding of suicidal thoughts and behaviours in young people with clinically diagnosed depressive disorders. More specifically, the aim was to identify modifiable intervention targets, which could inform clinical treatment approaches, and suicide prevention and early intervention efforts more broadly. Methods This research program comprises four studies each addressing different research questions. Study 1 is a comprehensive systematic review of contributors to suicidality in young people with unipolar and bipolar depression. Study 2 is an analysis of the dimensionality of a widely used measure of suicidal ideation, including associations between this measure’s latent factors and actual suicidal behaviour in young people with major depressive disorder (MDD). Study 3 is an investigation of how different dimensions of social support are associated with suicidal ideation in a treatment seeking cohort of young people with MDD; and Study 4 is a longitudinal analysis of associations between a range of psychosocial correlates and suicidal ideation severity in this same cohort of young people MDD, assessed over a 12-week period. Main Results Several key themes can be drawn from the findings of this research program. First, there is a lack of consensus regarding how the construct of suicidality should be defined, highlighting the need for international collaboration in the development of a standardised, validated classification system for suicidal ideation and suicidal behaviours. The second key finding is that suicidality in young people with depressive disorders is multidimensional in nature. That is, the way in which suicidality manifests in an individual is multifaceted. Suicidality is comprised of multiple constructs encompassing both active and passive ideation, intrapersonal cognitions such as hopelessness and lack of self-worth, and interpersonal factors such as perceived burdensomeness. The third key finding is that there are multiple determinants of suicidality in young people with depressive disorders; in addition to depressive symptoms, there are numerous other predictors of the nature and severity of suicidality. Notably, familial support is an important protective factor, while psychopathological features such as state and trait anxiety contribute to suicidality severity. Discussion Outcomes of this research program reinforce the notion that suicidality is complex and multideterminant in nature. Depression symptomatology is an important contributor, suggesting that regular monitoring of depression symptom severity should be a core aspect of the clinical management of suicidality in young people with depressive disorders. Suicidality is not driven by depression symptomatology alone and it is clear that suicide prevention and intervention efforts need to go beyond simply reducing depression severity. Psychiatric comorbidity with depression, particularly comorbid anxiety, is an important determinant of suicidality. Anxiety and depression, in particular, share many clinical features and risk factors. Interventions targeting transdiagnostic features could have clinical utility in reducing the burden of suicide in young people. In addition, methodological assessment of personality features and carefully targeted intervention approaches such as dialectal behaviour therapy, or mentalization-based therapy, could be a beneficial component of the clinical management of depression and suicidality in young people. An important clinical implication of this research program is that there is likely substantial variability underlying the mechanisms for suicidality from one depressed young person to the next. This suggests that there is perhaps a similarly high degree of variability with respect to potentially effective treatment targets for suicidality. It raises the question of how useful it is to consider a diagnosis of depression as a specific risk factor for suicidality in young people. Alternative approaches to identifying aetiological mechanisms of suicidality, such as a specific symptom approach, could be warranted. It is crucial to develop and employ early intervention approaches for suicidality in young people which focus on the earliest stage of suicidality. Potential targets for early intervention, such as increasing adaptive social support to reduce severity of suicidal ideation, are likely to be beneficial in preventing transition to suicidal behaviour. This highlights the need to assess and monitor suicidality early in young people presenting with mental health symptoms, irrespective of the specific diagnosis. This requires the use of age-appropriate suicidality assessment tools designed for use in young people. Given the fluctuating nature of suicidality, real-time symptom monitoring could perhaps be implemented as part of routine clinical care. The use of transdiagnostic interventions aimed at modifying common cognitive processes underlying depression, anxiety, and suicidality could be an effective treatment approach. Although suicidality is a complex phenomenon and no single approach to prevention or intervention is likely to be universally effective, the findings of this research program do have the potential to help reduce the suicidality-related health burden in this particularly vulnerable population.
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ItemSuicide prevention in young people( 2014)Suicide-related behaviour is a significant problem among young people in Australia. Although the reduction of youth suicide is a national priority there remains a lack of intervention research upon which to base preventative efforts. This thesis argues that there is the need for a greater number of intervention studies in suicide prevention, including brief, innovative interventions across a number of settings. The thesis begins by systematically reviewing the literature in the field of youth suicide prevention with an in-depth focus on suicide-related behaviour in school and clinical settings. The empirical component comprises four sequentially conducted studies that together aimed to examine the status quo with regard to suicide prevention research among young people in Australia and specifically examined the safety, acceptability and efficacy of two novel interventions designed to reduce suicide risk among youth in both a clinical and an educational setting. The studies employed a range of methodologies, and together sought to address some of the gaps in current research. Study One reported on the extent of suicide research that was conducted in Australia during the period 2007–2011, via an examination of published journal articles and funded grants. Study Two was a randomised controlled trial that tested the effects of a brief postcard intervention among 165 at-risk young people who had sought help from a specialist mental health service (the Postcard Study). Study Three was a cross-sectional survey administered to a random sample of school wellbeing staff across Victoria, Australia. The survey sought specific information regarding their views on approaches to suicide prevention in school settings, and in particular, with regard to using the Internet for the delivery of suicide prevention programs. The final study, Study Four, was a pilot study that employed a pre-test/post-test design to examine the efficacy, safety and acceptability of a cognitive behavioural therapy program (Reframe-IT), delivered via the Internet to 21 secondary school students at risk of suicide. Together, these studies demonstrated a lack of intervention research in the field of youth suicide prevention, as evidenced by a lack of both published papers and funded grants. They also showed that although schools are considered to be an appropriate setting for suicide prevention programs, school staff feel under-skilled when working with at-risk youth. That said a raft of approaches were reported as being required in schools, including information and awareness programs, specific suicide prevention training, screening programs and greater access to clinical services. The study also identified that school staff consider schools to be an appropriate and acceptable setting for conducting suicide prevention activities. The two intervention studies demonstrated that it is feasible and safe to conduct intervention research, including randomised controlled trials, with suicidal young people. Although the Postcard Study demonstrated no differences between the treatment and control groups, the intervention was considered to be acceptable and appeared to have no iatrogenic effects. Participants in the Reframe-IT Program all demonstrated reduced suicidal ideation, reduced depressive symptoms and reduced hopelessness at the end of the program. In addition, no iatrogenic effects were evident, indicating that there are safe ways of talking with young people about suicide via the Internet. As with much suicide research, each of these studies suffered from some methodological limitations. Despite this, these findings add to a growing body of evidence that is arguing for greater intervention research in this field. Indeed, it appears that it is feasible, safe and acceptable to test novel interventions with suicidal young people in both clinical and school settings and that interventions do exist that hold promise with this population. Hence, there is no reason for the continued exclusion of suicidal young people from research studies. The thesis concludes by outlining a number of opportunities for the future of suicide prevention research, and specifically articulates the need for a more collaborative and strategic approach to suicide research in Australia. This would enable many of the methodological limitations that frequently hamper suicide research to be overcome, and some of the pessimism that exists with regard to our ability to prevent youth suicide to be challenged.
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ItemDesign and refinement of the MATE program: Mindful Awareness Training and Education: how do young people understand and practise mindfulness?( 2012)Background and aims: Young people (aged 15-24) often experience difficulties regulating their emotions. This is thought to be a key mediator of distress and ill health. Improving emotion regulation is an important target for mental health promotion in this age group. Mindfulness practice includes cultivating awareness of emotions and developing skilful ways to deal with them. Mindfulness training has been shown to improve mental health in adults. Preliminary investigations have also been reported in children and adolescents. Few studies specific to young people are available and none have reported engaging young people themselves in the design process. Very little research has been reported into online delivery, and all of this work so far has involved adults. Using the Internet to provide mindfulness training has the potential to improve accessibility for young people. Very little research, all of which has involved adults, has been reported into online delivery. The aim in this project was to use a participatory, mixed methods approach to the design and preliminary evaluation of a mindfulness training program for young people in live and online editions. Methods: Initial design of the Mindful Awareness Training and Education program, MATE version 1, was informed by a review of the literature and discussion with experts. MATE v.2 was created after consultation with 13 mindfulness-naïve young people. The live edition of MATE v.2 was trialled with 11 participants. Evaluation included qualitative interviews, a focus group, written and online feedback, and quantitative measurement. The latter was conducted at commencement, immediately after the program and at six weeks’ follow-up. Qualitative data collection and analysis were informed by grounded theory. Results: Consultees on MATE v.1 described mindfulness training as a desirable activity for young people and offered valuable suggestions regarding program structure and content. Recruitment of participants for the pilot trial of MATE v.2 was difficult. Those enrolled showed a high level of engagement with both the program content and evaluation process: 73% completed all program stages, 88% of whom also attended either a focus group or interview. Benefits, in terms of improved emotion regulation and well-being, and reduction in symptoms of stress, anxiety and depression were suggested by qualitative and quantitative data. An explanatory model of participants’ experience was devised indicating that: (1) key initial benefits were a calmer mind and greater sense of agency; and (2) that with ongoing practice, additional benefits may occur. Greater understanding of their minds helped participants develop enhanced confidence and perceived competence in managing day-to-day challenges. Some participants reported transient increased distress in the middle weeks of the program. MATE v.3, the final version of the program, in live and online editions, resulted from an integration of findings. Conclusions: Mindfulness training appears to be acceptable to young people and a feasible strategy to enhance mental health and well-being in this age group. Participants in the live trial were able, within a short time, to develop a sophisticated understanding and application of mindfulness. The MATE program, as devised and refined in this project, is ready for large-scale face to face trial and for website development in its online edition.
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ItemNavigating the digital disconnect: understanding the use of information communication technologies by the youth health workforce to help improve young people's mental health and wellbeing( 2011)Despite local and national efforts to address the challenge, the mental ill-health of young people in Australia remains a leading public health concern. Over a quarter of all young Australians aged 16 to 24 experience a mental disorder in any one year (Australian Bureau of Statistics, 2010b). Suicide rates remain high, with suicide now the foremost cause of death in the 15 to 24 year old age group (Australian Bureau of Statistics, 2010a). Aside from its significant social impacts, mental ill-health has enormous economic implications. Economic modelling estimates that in 2009 the direct costs of untreated mental disorders in Australian young people totalled $10.6 billion (Access Economics, 2009). Unless addressed, the effects of mental ill-health can persist over an individual’s lifetime (Costello et al., 2006) and lead to further occupational, economic and interpersonal difficulties. Presently, only 29% of young Australians with a mental disorder seek help when they need it (Burns et al., 2010a, Slade et al., 2009). Timely and evidence-based treatments are only encountered by a small proportion of those young people who do receive care (Andrews et al., 2000, Libby et al., 2007). This has a substantial effect on the overall wellbeing of our community. (For full abstract see document)