Author/s & date	Title	Reason/s for exclusion
Abramovich et al. (2020)	Assessment of Health Conditions and Health Service Use Among Transgender Patients in Canada	Did not investigate factors for self-harm (not relevant)
Albuquerque et al. (2018)	Association between violence and drug consumption with suicide in lesbians, gays, bisexuals, transvestites, and transsexuals: cross-sectional study	Data not extractable
Angoff et al. (2021)	Intersecting identities and Nonsuicidal Self-Injury Among Youth	Not relevant
Atteberry et al. (2021)	Differential Experiences of Mental Health Among Transgender and Gender-Diverse Youth in Colorado	Not relevant
Bailey et al. (2014)	Suicide risk in the UK trans population and the role of gender transition in decreasing suicidal ideation and suicide attempt	Design or analysis (qualitative analysis)
Barnett et al. (2019)	Anti-LGBT victimisation, fear of violence at school, and suicide risk among adolescents	Subpopulation not extractable (LGBT)
Beckwith et al. (2019)	Psychiatric Epidemiology of Trans & nonbinary adult patients at an urban health center	Design or analysis (suicide measured under ‘psychiatrc acuity’ with other mental health outcomes)
Berona et al. (2020)	Predicting suicidal behavior among lesbian, gay, bisexual, and transgender youth receiving psychiatric emergency services	Subpopulation not extractable (LGBT)
Berona et al. (2021)	Predicting the Transition From Suicidal Ideation to Suicide Attempt Among Sexual and Gender Minority Youths	Subpopulation not extractable (LGBT)
Butler et al. (2019)	Self-harm prevalence and ideation in a community sample of cis, trans and other youth	Not relevant (examined prevalence rates)
Clark et al. (2023)	The role of sleep duration in suicide risk among sexual and gender minority adolescents	Subpopulation not extractable (Sexual & Gender Minority)
Cramer et al. (2020)	Preferences in information processing, marginalized identity, and non-monogamy-Understanding factors in suicide-related behavior among members of the alternative sexuality community	Subpopulation not extractable
de Bolger et al. (2014)	Australian Trans Men: Developmental, Sexuality, and Mental Health	Design or analysis
Del Rio-Gonzale et al. (2021)	Sexual Orientation and Gender Identity Change Efforts and Suicide Morbidity among Gender Minority Adults in Colombia	Design (prevalence and comparison between groups)
Drakeford (2018)	Correctional Policy and Attempted Suicide Among Transgender Individuals	Examined TGD inmates
Erlangsen et al. (2023)	Transgender Identity and Suicide Attempts and Mortality in Denmark	Not relevant (examined mortality, not factors)
Freese et al. (2017)	Distinct Coping Profiles Are Associated with Mental Health Differences in Transgender and Gender Nonconforming Adults	Not relevant (Coping styles and NSSI)
Fulginiti et al. (2021)	Sexual Minority Stress, Mental Health Symptoms, and Suicidality among LGBTQ Youth Accessing Crisis Services	Subpopulation not extractable (LGBTQ)
Gibbs & Goldbach (2015)	Religious Conflict, Sexual Identity, and Suicidal Behaviors among LGBT Young Adults	Subpopulation not extractable (LGBT)
Green et al. (2021)	Association of Sexual Orientation Acceptance with Reduced Suicide Attempts among Lesbian, Gay, Bisexual, Transgender, Queer and Questioning Youth	Manuscript not available, accessible, or author/s did not respond
Gnan et al. (2019)	General and LGBTQ-specific factors associated with mental health and suicide risk among LGBTQ students	Not relevant (didn't measures factors specifically for self-harm)
Green et al. (2021)	Cumulative minority stress and suicide risk among LGBTQ Youth	Subpopulation not extractable (LGBTQ)
Hatchel et al. (2019)	Predictors of Suicidal Ideation and Attempts among LGBTQ Adolescents: The Roles of Help-Seeking Beliefs, Peer Victimisation, Depressive Symptoms, and Drug Use	Subpopulation not extractable (LGBTQ)
Hatchel et al. (2019)	Peer victimisation and suicidality among LGBTQ youth: the roles of school belonging, self-compassion, and parental support	Subpopulation not extractable (LGBTQ)
Hershner et al. (2021)	Associations Between Transgender Identity, Sleep, Mental Health and Suicidality Among a North American Cohort of College Students	Not relevant (prevalence of variables between trans and cis people, and between US and Canadian students)
House et al. (2011)	Interpersonal Trauma and Discriminatory Events as Predictors of Suicidal and Nonsuicidal Self-Injury in Gay, Lesbian, Bisexual, and Transgender Persons	Subpopulation not extractable (LGBT)
Jadva et al. (2021)	Predictors of self-harm and suicide in LGBT Youth: The role of gender, socio-economic status, bullying and school experience	Subpopulation not extractable (LGBT)
Kaniuka et al. (2019)	Stigma and suicide risk among the LGBTQ population: Are anxiety and depression to blame and can connectedness to the LGBTQ community help?	Subpopulation not extractable (LGBTQ)
Klein et al. (2023)	The Mediating Role of Family Acceptance and Conflict on Suicidality among Sexual and Gender Minority Youth	Subpopulation not extractable (LGBTQ)
Knutson et al. (2021)	Profiles of Distress and Self-Harm Among LGBTQ + Transitional Youth in a Rural State	Subpopulation not extractable (LGBTQ+)
Lee et al. (2023)	Gender Identity Change Efforts Are Associated with Depression, Panic Disorder, and Suicide Attempts in South Korean Transgender Adults	Manuscript not available, accessible, or author/s did not respond
Lee et al. (2021)	Transgender Adult's Public Bathroom-Related Stressors and their Association with Depressive Symptoms: A Nationwide Cross-Sectional Study in South Korea	Manuscript not available, accessible, or author/s did not respond
Liu et al. (2012)	Suicidal Ideation and Self-Harm in Lesbian, Gay, Bisexual, and Transgender Youth	Subpopulation not extractable (LGBT)
Lytle et al. (2018)	Suicidal and Help-Seeking Behaviors Among Youth in Online Lesbian, Gay, Bisexual, Transgender, Queer, and Questioning Social Network	Subpopulation not extractable (LGBTQQ)
McDermott et al. (2017)	The social determinants of lesbian, gay, bisexual, and transgender youth suicidality in England: a mixed methods study	Subpopulation not extractable (LGBT)
McGraw et al. (2023)	Stigma and negative mental health outcomes in sexual/gender minority youth in Utah	Subpopulation not extractable (LGBT)
McGraw et al. (2021)	Family, Faith, and Suicidal Thoughts and Behaviors (STB) Among LGBT Youth in Utah	Manuscript not available, accessible, or author/s did not respond
Mereish et al. (2014)	Interrelationships between LGBT-Based Victimisation, suicide and Substance Use Problems in a Diverse Sample of Sexual and Gender Minority Men and Women	Subpopulation not extractable (LGBT)
Moallef et al. (2022)	The relationship between sexual and gender stigma and suicide attempt and ideation among LGBTQI + populations in Thailand: findings from a national survey	Subpopulation not extractable (LGBTQI)
Morris & Galupo (2019)	“Attempting to Dull the Dysphoria”: Nonsuicidal Self-Injury Among Transgender Individuals	Design (quantitative data from mixed methods is not relevant)
Patten et al. (2022)	Circumstances of Suicide Among Lesbian, Gay, Bisexual, and Transgender Individuals	Data from other sources (not individual – police, etc. after death)
Skerrett et a l. (2014)	Suicides among lesbian, gay, bisexual, and transgender populations in Australia: An analysis of the Queensland Suicide Register	Subpopulation not extractable (LGBT)
Smith et al. (2019)	Longitudinal Predictors of Self-Injurious Thoughts and Behaviors in Sexual and Gender Minority Adolescents	Subpopulation not extractable (LGBT)
Speer et al. (2022)	An Intersectional Modeling of Risk for Nonsuicidal Self-Injury Among LGBTQ Adolescents	Subpopulation not extractable (LGBT)
Spivey, L. A., & Prinstein (2019)	A Preliminary Examination of the Association between Gender Nonconformity and Suicidal Thoughts and Behaviors	Subtractable population not identifiable (not clear which results pertain to GNC youth)
Srivastava et al. (2021)	Differential Risks for Suicidality and Mental Health Among Transgender, Nonbinary, and Cisgender Sexual Minority Youth Accessing Crisis Services	Not relevant (No measure of risk factor/self-harm outcome significance)
Turban et al. (2021)	Timing of Social Transition for Transgender and Gender Diverse Youth, K-12 Harassment, and Adult Mental Health Outcomes	Not relevant (Measured differences between age groups of TGD people)
Ugeto et al. (2022)	Differences in suicidality and psychological symptoms between sexual and gender minority youth	Subpopulation not extractable (sexual & gender minority)
Vanbronkhorst et al. (2021)	Suicidality among Psychiatrically Hospitalized Lesbian, Gay, Bisexual, Transgender, Queer and/or Questioning Youth: Risk and Protective Factors	Manuscript not available, accessible, or author/s did not respond
Wang et al. (2021)	Methods of attempted suicide and risk factors in LGBTQ + youth	Subpopulation not extractable (LGBTQ+)
Wang et al. (2021)	Suicide attempts among Taiwanese lesbian, gay, bisexual and transgender adults during the 2018 Taiwan referendum on same-sex issues	Subpopulation not extractable (LGBT)
Watson & Tatnell (2022)	Resilience and non-suicidal self-injury in LGBTQIA+	Subpopulation not extractable (LGBTQIA+)
Watts et al. (2023)	Transgender and gender expansive emerging adults: the moderating role of thwarted belongingness on mental health	Not relevant (not measuring factors for suicide or self-harm)
White et al. (2023)	Psychological distress, self-harm and suicide attempts in gender minority compared with cisgender adolescents in the UK	Not relevant (did not measure factors against self-harm specifically)