Clinical Research Directory

Suicidal Behavior in Adolescents and Executive Functions

Suicide is a major public health concern, particularly among young people. In France, around 400 adolescents die by suicide every year, and suicide attempts are most frequent during adolescence. This stage of life is marked by profound emotional, social, and biological changes, which can increase vulnerability to stress and psychological distress. Current research shows that suicidal behaviors do not result from a single cause. Instead, they emerge from a complex interaction between individual vulnerabilities and stressful life events. Among these vulnerabilities, cognitive functioning-and more specifically executive functions-has attracted growing scientific interest. Executive functions refer to a set of high-level mental abilities that allow individuals to regulate their thoughts, emotions, and actions. They include skills such as controlling impulses, adapting to new situations, planning ahead, and holding information in mind. These abilities are essential for everyday life, school learning, social interactions, and emotional regulation. Importantly, the brain networks supporting executive functions continue to develop throughout adolescence, making them particularly sensitive to psychological and environmental challenges. In adults, several studies have shown that people with suicidal ideation or a history of suicide attempts often present difficulties in executive functioning. Such difficulties may contribute to poorer emotional regulation, increased rumination, reduced impulse control, and impaired decision-making during periods of crisis. However, in adolescents, research in this area remains limited, often involving small samples or focusing on only one or two cognitive abilities. The main aim of this study is therefore to better understand the relationship between executive functions and suicidal behaviors in adolescents, using a comprehensive assessment tool specifically designed and validated for children and teenagers. This tool allows for a global evaluation of key executive components, including inhibition, working memory, cognitive flexibility, and planning. A secondary objective of the study is to compare executive functioning between adolescents who experience suicidal thoughts and those who have attempted suicide. Some findings in adults suggest that these two groups may show different cognitive profiles, but this distinction has rarely been explored in younger populations. In addition, cognitive difficulties may not only appear during testing but also have a real-life impact, affecting academic performance, emotional regulation, and social relationships. For this reason, the study also examines how executive difficulties affect everyday functioning, by collecting information from adolescents themselves, their parents, and the school environment. Finally, suicidal behaviors in adolescents are influenced by many other factors, particularly psychiatric disorders such as depression, anxiety, and the consequences of traumatic experiences. Depression, in particular, is one of the strongest risk factors for suicide. This study therefore also aims to explore how these psychiatric conditions may influence executive functioning and shape the relationship between cognitive difficulties and suicidal behavior. By improving our understanding of these mechanisms, this research seeks to support the development of more effective prevention strategies and better-targeted clinical interventions for adolescents at risk.

Intensive Dialectical Behavior Therapy for Self-Harm and Suicidal Behavior in Youth: A Pilot Study

The prevalence of self-harm and suicidal behavior among adolescents has increased dramatically over the past two decades-a fourfold rise that represents both a severe personal burden and a substantial public health challenge. Dialectical Behavior Therapy for Adolescents (DBT-A) is the gold-standard treatment; however, the standard 20-week format is resource-intensive and time-consuming, which limits accessibility. An intensive 4-week DBT (I-DBT) program has been developed that may improve access and reach a larger number of adolescents. The investigators now seek to evaluate its feasibility and preliminary outcomes. The investigators will assess the feasibility of I-DBT in two to three adolescent groups comprising a total of 8-12 participants and their caregivers in spring and autumn 2026, examining recruitment, feasibility, and outcome measures such as self-harm, suicide attempts, acute hospital admissions, depression, and quality of life, as well as treatment dropout. The investigators aim to use the feedback to make necessary adjustments before broader testing of the I-DBT intervention.

Adapted Visual Safety Plan for Autistic Youth (VSP-AY) to Address Self-harm, Suicidal Ideation, and Suicide Behaviors

This pilot randomized controlled trial will recruit 90 autistic adolescents aged 13-18 years with recent suicidal thoughts or behaviors from Geha Mental Health Center in Israel. Participants will be randomly assigned in a 1:1 ratio to either (1) the intervention group receiving the Visual Safety Plan for Autistic Youth (VSP-AY) plus standard care, or (2) the control group receiving treatment as usual without VSP-AY. Mental health professionals delivering VSP-AY will complete a 6-hour training with ongoing supervision throughout the study. Outcomes will be assessed at three timepoints: baseline (T0), immediately post-intervention (T1), and one-month follow-up (T2). The study will evaluate feasibility through recruitment and completion rates, acceptability through satisfaction questionnaires and qualitative interviews, and preliminary effectiveness through standardized measures of suicidal ideation (Columbia Suicide Severity Rating Scale), non-suicidal self-injury (NSSI-AT), and depression (Children's Depression Inventory).

Sleep Treatment for Teens (RCT Phase)

The purpose of this research study is to compare (vs. treatment as usual) a brief (6-session), empirically supported, and highly disseminable version of digital (i.e., smartphone or web-based) cognitive behavioral therapy for insomnia (dCBT-I), called SleepioTM, in suicidal adolescents with co-occurring insomnia during the high-risk post-hospitalization period. Suicide is the 2nd leading cause of death among adolescents. Sleep problems, such as insomnia symptoms-the most common sleep problem in youth-may be a particularly promising treatment target to reduce suicide risk in adolescents. The investigators propose to test the feasibility, acceptability, and effectiveness of dCBT-I in a two-site (Rutgers and Old Dominion University) pilot study trial. Adolescents, 14-18 years-old, recently hospitalized for suicide risk with co-occurring insomnia (n=80, 50% at each site), will receive either dCBT-I (six weekly, 20-minute sessions) plus post-hospitalization treatment-as-usual (TAU) or TAU alone. Adolescents will complete assessments pre-treatment, during the treatment phase including at the end of treatment, and 1-month follow-up post-treatment.

Shame-Focused Cognitive Behavioral Therapy For Reducing Suicide Risk In Adolescent Psychiatric Inpatients (SF-CBT)

This pilot randomized controlled trial (RCT) aims to evaluate the feasibility, acceptability, and preliminary efficacy of Shame-Focused Cognitive Behavioral Therapy (SF-CBT) among high-risk psychiatric inpatient adolescents. Shame has been identified as a critical psychological mechanism underlying suicidal ideation and behavior, yet few interventions directly target it. SF-CBT is a structured, manualized intervention designed to reduce shame, improve coping strategies, and lower suicide risk. Approximately 42 adolescents aged 13-18 years, admitted for recent suicide attempt or severe suicidal ideation, will be randomized in a 2:1 ratio to receive either SF-CBT or supportive therapy (ST). Both conditions include 7 individual sessions for adolescents and 3 structured psychoeducation sessions for parents/guardians. Primary outcomes include feasibility metrics (recruitment, retention, adherence, fidelity, adverse events) and acceptability ratings from adolescents, parents, and therapists. Secondary outcomes include changes in suicidal ideation, suicidal behavior, shame, and coping styles, assessed at baseline, post-treatment, and 1-, 3-, and 6-month follow-ups. Findings will inform refinement of the intervention manual, establish feasibility benchmarks, and provide effect size estimates to guide a subsequent large-scale RCT.

Integrated Suicide Supports and Safety Planning for Youth

The goal of this clinical trial is to evaluate an app to help keep teens and young adults with suicidal thoughts safe. The app includes a safety plan created by adolescents and healthcare providers in the clinic, and videos to encourage supportive communication and skills for teens and young adults to stay safe. The main question it aims to answer is whether the use of an app can increase youth suicide-related coping for youth with suicidal ideation, parent suicide prevention self-efficacy, and healthcare provider self-efficacy in suicide management. Researchers will compare usual care to usual care with the app. Participants, including adolescents, their caregivers and healthcare providers, will use the ISSP app (if assigned to that group) and complete three online surveys.

Evaluation of an App for Young People With Suicidal Thoughts

There are currently very few evidence-based tools specifically designed to support children and adolescents experiencing suicidal thoughts. Digital interventions are increasingly used in suicide prevention and show promise in helping young people improve emotional regulation, coping skills, and manage suicidal thoughts and behaviors. In Flanders, the app BackUp was developed in 2015 by VLESP to support adults with suicidal thoughts. Research showed that while the app led to a small, non-significant reduction in suicidal thoughts after one week, 70% of users found it helpful in daily life. A key feature of the app is the Safety Plan, based on cognitive behavioral therapy, which helps individuals identify coping strategies and sources of support. This approach has proven effective in reducing suicidal behavior and is also suitable for use with children and adolescents. Despite these developments, there is still a need for a digital tool specifically tailored to young people. In 2023, the investigators launched a project to develop a new app in collaboration with youth care professionals, app developers, and adolescents with lived experience of suicidality. Their input ensures the app meets the needs and preferences of young users. This study aims to evaluate the effectiveness and usability of the app through a pilot study involving adolescents aged 12-17 who are currently experiencing suicidal thoughts. Participants and their parents or guardians must provide informed consent before joining the study. The evaluation includes online questionnaires completed before and after using the app. These questionnaires collect information on demographics, coping strategies, and the severity of suicidal thoughts and behaviors. The post-assessment also includes questions about user experience and satisfaction. No interviews are conducted; all data are collected digitally. Participants are recruited through various channels and must meet specific inclusion criteria. After completing the initial questionnaire, they receive a code to access the app, ensuring that only study participants can use it.

Multimodality Adaptive Intervention for Post-Inpatient Hospitalization Suicide Risk Reduction

The goal of this clinical trial is to learn whether a combination of brief digital and clinician-delivered interventions can help adults leaving a psychiatric hospitalization cope with suicidal thoughts and prevent suicide-related events. The main questions it aims to answer are: * Are people who receive automated smartphone messages when they report suicidal thoughts after leaving the hospital less likely to have a suicide-related event than those who do smartphone self-monitoring alone? * Are people who have additional session(s) with a clinician in the four weeks after leaving the hospital less likely to have a suicide-related event than those who receive additional brief self-guided intervention(s)? Participants will be asked to: * Make a personalized safety plan (of coping strategies to use when feeling suicidal) before leaving the hospital * Do self-monitoring of suicidal thoughts and related experiences on their smartphone for four weeks after leaving the hospital * Complete a longer set of research questionnaires at the start of the study and five more times during the 12 weeks after leaving the hospital Depending on which study group they are in and whether they benefit from initial smartphone interventions, participants may or may not: * Receive automated smartphone messages reminding them of coping strategies to use for suicidal thoughts * Receive up to three additional sessions with a study clinician * Receive up to three brief online self-guided interventions The study interventions last for the four weeks after leaving the hospital. Participants will also be asked permission to share information from their health records about care received for 12 weeks after leaving the hospital.

Brief Intervention and Contact Program Main Trial

Suicide is a significant public health concern and causes approximately 1.5% of all deaths in the general population in Canada. Research shows that for individuals with comorbid psychiatric illness and suicidal behaviour, the risk of further suicide attempts persists in the first two years post-discharge with the most vulnerable time being the period immediately post discharge. Several studies have found that alongside usual treatment, follow-up with discharged patients through text messaging, phone calls and letters, contributes to a reduction in attempts and death by suicide, and instances of self-harm. In particular, brief contact interventions have shown positive impacts in reducing further completed suicide and suicidal behaviour in patients presenting to the emergency department following a suicide attempt. The BIC model followed in this study is adapted from the WHO protocol that was utilised as part of the Multisite Intervention Study On Suicidal Behaviours (SUPRE-MISS).

The Epidemiology of Suicide Attempts and Suicidal Thoughts in Flanders

The objective of this study is to collect data in Flanders on the incidence of suicide attempts and suicidal ideation across various healthcare settings. The study also aims to assess the proportion of individuals who receive adequate aftercare following a suicide attempt and to systematically document the methods and means used in suicidal behavior.

Inhibitory Mechanisms of Negative Urgency in Adolescent Suicidal Behavior

The goal of this study is to understand why some people act more impulsively when feeling negative emotions, which is called negative urgency. The researchers hope to understand how negative urgency relates to the way networks of brain cells communicate with one another. The researchers will measure negative urgency and brain signals in adolescents aged 13-21 years with depression and suicidal thoughts and behaviors. The main questions it aims to answer are: * Whether a type of brain signaling called cortical inhibition is related to negative urgency * Whether depressed adolescents with suicidal behavior have more problems with cortical inhibition than depressed adolescents with suicidal thoughts only * Whether the relationship between negative urgency and cortical inhibition changes over time Adolescents who participate in the study will complete the following activities at the time they join the study, as well as 6 months and 12 months later: * Interviews with researchers and questionnaires to learn about their thoughts, emotions, and symptoms * A questionnaire about impulsive behaviors and negative urgency * Computerized games that measure brain functions * An MRI scan of the brain * Transcranial magnetic stimulation with electroencephalography (TMS-EEG), a way to measure how brain cells communicate (cortical inhibition) using a magnet placed outside of the head and recording brain signals

Understanding and Acting to Regulate Suicidal Behavior

Data from Santé Publique France show that since the onset of the health crisis (covid-19), there has been an increase in emergency room visits for mood disorders among children under 15 years of age, with a notable rise in the number of visits since early September 2020 compared to previous years. Recent literature considers Dialectical Behavior Therapy (DBT) as the only approach that has demonstrated (albeit weak to moderate) effects on the recurrence of self-harming behaviors. It is within this context, and based on these various findings, that the CARES program was developed (Understanding and Acting to Regulate Emotions and Suicidal Behaviors), aimed at adolescents who have engaged in suicidal behaviors or who have active suicidal ideation. The objective of this study is to compare the CARES program for adolescents alone to the CARES program for adolescents combined with a parent group using Non-Violent Resistance (NVR) on the occurrence of self-harming behaviors among adolescents who have engaged in suicidal acts and/or have active suicidal ideation, six months after the conclusion of the intervention. This is a prospective, randomized, open-label, single-center, controlled study with two parallel arms, with blinded assessment of the outcome measures.

Basal Plasma Lithium Levels and Suicidal Events

Suicidal behavior is a major public health issue and there are currently no specific treatments for it. However, lithium, the reference treatment for bipolar disorder, have been shown to be effective in preventing suicidal risk. Apart from drug treatments, lithium is present in our environment and its levels varies from one individual to another, depending, especially, on diet. Knowing that patients with a mood disorder generally have a poor lifestyle and a less rich and varied diet than the general population, variations in basal lithium levels can be expected in these patients.

Psychoeducation for Suicidal Behavior

The aims of the recent World Health Organization report, highlighting that every 40 seconds a person dies from suicide somewhere in the world, are to increase awareness on the public health significance of suicide and make suicide prevention a greater priority within the global public health agenda. Across age groups, less than half of individuals at elevated suicide risk interface with some form of mental health services. Several barriers to help-seeking have been identified (maladaptive coping, lack of perceived need, beliefs about treatment effectiveness, fear of hospitalization or mistrust of providers, stigma...), which are key targets in knowledge-based interventions on suicide. Psychoeducational programs have shown effectiveness in prevention relapse for several mental disorders such as schizophrenia, bipolar disorder or recurrent depressive disorder, improving treatment adherence and self-confidence in coping with symptoms of the disease. They are highly recommended for addressing adherence problems in patients with serious and persistent mental illness. Only one team has published a study protocol for a controlled trial assessing a 10 group sessions psychoeducational program for prevention in patients having a suicide history, in a one-year follow-up. Interestingly, diagnosis-mixed group psychoeducation have shown superiority than an unspecific intervention add-on routine care, on the suicide prevention and compliance for severe psychiatric disorders. Those psychoeducational-specific elements are namely the interactive transfer of illness and treatment-related knowledge and management/coping - cognitive/behavioral - strategies, as defined by the National Institute for Health and Care Excellence)-Guidelines (NICE). Notably, as several psychiatric diagnoses are associated with suicidal behavior (SB), coping strategies have to target processes that overlap among these psychiatric disease, as well as suicidal vulnerability. Acceptance and Commitment Therapy (ACT), a "third wave" behavioral therapy, targets experiential avoidance and psychological flexibility, at the core of psychiatric disorders. Interestingly, in patients with a history of suicidal depression, training in mindfulness can help to weaken suicidal thinking associated with depressive symptoms , and thus reduce an important vulnerability for relapse to suicidal depression. ACT would also increase intrinsic motivation for daily life action (i.e. reasons for living and acting). Then, the functional analysis (matrix) used in ACT seems to be an useful tool to help patient in decision making, a neuropsychological factor impaired in suicidal patients. Finally, acceptance and commitment group therapy has suggested effectiveness in reducing intensity and frequency of suicidal thoughts, through improvement in acceptance, in high risk suicidal patients. As compared with ACT, Dialectical behavior therapy (DBT) teaches added distress tolerance in view of survive the crisis. DBT is the most validated therapy for borderline personality disorder, the mental disorder the most associated with SB . Notably, group skills training is the most effective component in DBT for preventing suicidal behavior in borderline patients with high suicidal risk. Furthermore, interventions based on positive psychology have suggested efficacy in reducing depressive symptoms and suicidal ideation. Notably, in a recent pilot study, positive psychology exercises delivered to suicidal inpatients were feasible and associated with short-term gains improvement in optimism and hopelessness. Finally, as altered social link and sense of belonging have been widely involved in SB, relationship skills are an interesting positive psychology area for suicide prevention program. Psychoeducational program integrating knowledge as well the last innovating cognitive-behavioral coping strategies for SB is of major interest in suicide prevention. Investigators developed the first French program of suicide psychoeducation called "PEPSUI". The aim of this innovating program is to teach patients the more recent knowledge about suicidal behaviour (SB) and effective treatments, through didactic and interactive sessions. Thus, the objective is to conduct the patients to become experts and actors of their disease, increasing adherence to treatment. Besides, the patients will experiment the last innovating psychological skills to cope with unpleasant emotions and thoughts (including suicidal thoughts), distress tolerance skills and crisis strategies, and identify personal purpose in life and learn positive psychological skills in order to anchor with meaningful and pleasant components in life. Thus, this program will include skills from ACT, DBT and positive psychology. Finally, this primary care research is about a program which aim at improving accessibility to mental health services, care adherence and continuity for suicidal patients.