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Open research questions in Suicide and Self-Harm Studies

1,781 gap statements mined from Suicide and Self-Harm Studies papers in our 7.9M-paper local library, which holds 11,357 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Existing research has largely examined the predictive effects of childhood maltreatment on the severity of NSSI. Empirical studies remain limited regarding how distinct maltreatment subtypes influence the developmental trajectory of NSSI. Gender differences in these associations have received little attention.

    From hurt to harm: how types of childhood maltreatment shape the trajectories of non-suicidal self-injury through developments in depressive symptoms and peer victimization · 2026 · DOI

  • There is a lack of experimental evidence on relief-learning in NSSI. The relationship between NSSI and relief-learning is not well understood.

    Relief and blunted defensive conditioned responses in girls with non-suicidal self-injury behaviors · 2026 · DOI

  • Previous studies have focused on single genes and limited environmental factors, leaving a gap in understanding the complex interactions. Many previous gene-by-environment studies have focused on single genes, which often limits statistical power and the replicability of findings. The study aims to fill the gaps in previous research by examining the interaction between genetic and environmental factors.

    Beyond single risk factors: defeat and genetic variations linking cumulative interpersonal risk to suicidal ideation in Chinese adolescents · 2026 · DOI

  • Future studies should investigate the causal relationships between STS, emotional labor, depression, and suicidal ideation. Future studies should examine the generalizability of the findings to other populations, such as civilian dispatch personnel. Future studies should use longitudinal designs to examine the temporal relationships between the variables.

    Associations of Secondary Traumatic Stress and Emotional Labor with Suicidal Ideation Among Emergency Dispatch Personnel in South Korea: A Cross-Sectional Moderated Mediation Analysis · 2026 · DOI

  • Prior research has primarily focused on personnel who respond directly to emergency scenes, with less attention given to emergency dispatch personnel. There is a lack of studies investigating the associations of secondary traumatic stress and emotional labor with suicidal ideation among emergency dispatch personnel.

    Associations of Secondary Traumatic Stress and Emotional Labor with Suicidal Ideation Among Emergency Dispatch Personnel in South Korea: A Cross-Sectional Moderated Mediation Analysis · 2026 · DOI

  • There is a lack of data on the prevalence and correlates of suicidal ideation and self-harm behaviors across the spectrum of childhood. Prior studies have focused on adolescents, with less attention to younger children. There is a need for updated prevalence data to better understand and respond to children's current mental health and service needs.

    Prevalence and correlates of suicidal ideation and self-harm behaviors in children aged 4–17: Are there age and sex-differences? · 2026 · DOI

  • Prior cross-national studies have mainly quantified average associations with suicidal behavior, but less is known about the network position of loneliness. There is a gap in understanding how urbanization affects the network position of loneliness in adolescent suicide risk. The study aims to fill this gap by examining cross-national variation in the network position and predictive role of loneliness.

    Urbanization and the network position of loneliness in adolescent suicide risk: A four-stage analysis across 87 countries · 2026 · DOI

  • The synthesis may be challenged by the heterogeneity of the included studies and the lack of clear separability between suicidal and non-suicidal self-injury. The review may also be limited by the lack of involvement of adolescents with NSSI disclosure experience, family members, carers, and service-user representatives in the development of the protocol.

    Lived experiences, barriers, and facilitators of voluntary non-suicidal self-injury disclosure among adolescents who have disclosed: a qualitative systematic review protocol · 2026 · DOI

  • There is a lack of research on the intersection of suicidal thoughts and behaviors (STB) and screen time. The existing literature on digital phenotyping in mental health does not adequately address the relationship between STB and screen time.

    Smartphone Screen Time Characteristics in People With Suicidal Thoughts: Retrospective Observational Data Analysis Study · 2024 · DOI

  • Universal suicide risk screening in pediatric primary care settings is lacking, despite the endorsement of this practice by several national organizations.

    Barriers to and Facilitators of Implementing Suicide Risk Screening in Pediatric Primary Care: A Qualitative Study · 2026 · DOI

  • Few studies have explored the use of these tools to assess when the effect of certain factors is uncertain or inconsistent.

    A Review of Suicide-Related Risks through Propensity Score Methods using the Maryland Suicide Data Warehouse · 2026 · DOI

  • The class-level association for atypical antidepressants was not observed consistently across its individual agents, and age-related differences warrant further investigation.

    Comparative Risk of Suicide-Related Events Across Antidepressant Classes in Autistic Individuals: A New-User Active Comparator Cohort Study · 2026 · DOI

  • Suicide risk in Parkinson's disease (PD) remains understudied, with limited exploration of the impact of neuropsychiatric comorbidities and commonly prescribed PD and psychiatric medications.

    Anxiety is associated with increased risk of suicidality in Parkinson's disease · 2026 · DOI

  • Suicide rates among reproductive-aged females have increased in recent decades, yet biopsychosocial contributors to risk remain understudied.

    Prospective daily evidence of cyclic suicidality and self-harm in premenstrual disorders · 2026 · DOI

  • Research on suicide among individuals with intellectual disability (ID) remains underresearched.

    Caregiver-reported precursors of suicide-related behavior in individuals with intellectual disability: an exploratory qualitative study · 2026 · DOI

  • Recent research identifies aggression as a risk factor for veteran suicide, yet little is known about moderators of the aggression-suicide association.

    Characterizing aggression and suicide attempts among high-risk U.S. Veterans: Demographic, clinical, and military characteristics · 2026 · DOI

  • Current evidence suggests that suicide risk prediction, whether based on clinical judgment or structured risk assessment tools, remains ineffective. Existing prediction models focus predominantly on static risk factors rather than incorporating dynamic factors, resulting in models that fail to offer actionable insights for clinical decision-making.

    Predicting suicide attempts in a high-risk clinical cohort of adolescents using machine-learning · 2026 · DOI

  • Addressing the specific needs of adolescents with depressive disorders and non-suicidal self-injury in China. Evaluating the treatment effects using various scales and an autonomic nervous function tester.

    Effects of family-integrated emotion regulation group therapy on non-suicidal self-injury among adolescents with depressive disorders: a randomized controlled follow-up study · 2026 · DOI

  • Prior work has focused on global intellectual functioning, but increasing evidence suggests that intra-individual variability across index scores may be associated with substantial clinical relevance.

    Cognitive heterogeneity and clinical outcomes in adolescent psychiatric inpatients: a data-driven study · 2026 · DOI

  • Incorporate additional follow-up time points to comprehensively assess the long-term effects of the intervention, - Include structured questionnaires or interviews to specifically evaluate changes in parental attitudes during the family meetings, - Design hybrid trials that simultaneously assess outcomes for both parents…

    Effects of family-integrated emotion regulation group therapy on non-suicidal self-injury among adolescents with depressive disorders: a randomized controlled follow-up study · 2026 · DOI

  • Further research could investigate the relationship between cognitive heterogeneity and clinical outcomes in other populations, - Longitudinal studies could examine the stability of cognitive profiles over time, - Studies could explore the neural mechanisms underlying cognitive…

    Cognitive heterogeneity and clinical outcomes in adolescent psychiatric inpatients: a data-driven study · 2026 · DOI

  • Investigate the reasons for higher prevalence of self-harm and suicidal ideation in female adolescents, - Examine the role of differential exposure to risk factors in sex differences, - Explore the impact of social media use on suicidal ideation and self-harm…

    Prevalence and correlates of suicidal ideation and self-harm behaviors in children aged 4–17: Are there age and sex-differences? · 2026 · DOI

  • Investigate the causal relationships between loneliness, urbanization, and adolescent suicide risk, - Examine the role of other macro-level indicators in shaping the relationship between loneliness and suicidal ideation, - Explore the implications of the findings for prevention and intervention…

    Urbanization and the network position of loneliness in adolescent suicide risk: A four-stage analysis across 87 countries · 2026 · DOI

  • Findings that combine suicidal and non-suicidal self-injury without clear separability, or for which intent remains unresolved, will be excluded, limiting the evidence available…

    Lived experiences, barriers, and facilitators of voluntary non-suicidal self-injury disclosure among adolescents who have disclosed: a qualitative systematic review protocol · 2026 · DOI

  • Suicide among preteens remains understudied despite increases in suicide rates and medical encounters…

    Characteristics and Circumstances of Preteen and Teen Suicide Decedents · 2026 · DOI

Most-cited papers in Suicide and Self-Harm Studies

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Open questions raised by papers listed on this page include: (1) Empirical studies remain limited regarding how distinct maltreatment subtypes influence the developmental trajectory of NSSI (“From hurt to harm: how types of childhood maltreatment shape the trajectories…”, 2026); (2) There is a lack of experimental evidence on relief-learning in NSSI (“Relief and blunted defensive conditioned responses in girls with non-suicidal…”, 2026); (3) Future studies should investigate the causal relationships between STS, emotional labor, depression, and suicidal ideation (“Associations of Secondary Traumatic Stress and Emotional Labor with Suicidal…”, 2026); (4) There is a lack of data on the prevalence and correlates of suicidal ideation and self-harm behaviors across the spectrum of childhood (“Prevalence and correlates of suicidal ideation and self-harm behaviors in…”, 2026); (5) Prior cross-national studies have mainly quantified average associations with suicidal behavior, but less is known about the network position of loneliness (“Urbanization and the network position of loneliness in adolescent suicide risk:…”, 2026). 1,781 gap statements have been mined from Suicide and Self-Harm Studies papers in our 7.9M-paper local library, which holds 11,357 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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