Can LGBTQ+-Affirmative therapy protocols reduce Self-Harm risk in youth?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

DBT Cohort Young Person Sample 1 Inclusion criteria will include that the young person: 1. Is aged 13 to 21 years old; 2. has completed at least four months of comprehensive DBT (i.e. inclusive of all four modes of intervention; Linehan, 1993; Miller et al., 2006; Rathus \& Miller, 2015) in the past 24 months or have completed at least four months of DBT and are still in a comprehensive DBT programme; 3. identifies as LGBTQ+ (including those questioning or unsure about their orientation/identity); 4. is willing and able to participate in the study. While no specific inclusion or exclusion criteria will be placed on other variables, typically to be eligible for a DBT programme, young people would need to have a history of self-harm and/or suicidal behaviours, difficulties with emotion regulation, and potentially difficulties with the remaining symptom list within borderline/emotionally unstable personality disorder. Recruitment size is based on PPI recommendations regarding effective group sizes, with allowances for sample attrition. Non-DBT Cohort Young Person Sample 2 Inclusion criteria will follow similar to sample 1. The young person: 1. Is aged 13 to 21 years old; 2. has not accessed and is not currently enrolled in a comprehensive DBT programme; 3. has experienced difficulties with LGBTQ-related identity confusion, managing stigma experiences, and connecting with similar others; 4. identifies as LGBTQ+ (including those questioning or unsure about their orientation/identity); 5. is willing and able to participate in the study (i.e. are based in the UK and can attend the in-person and online groups). No other inclusion or exclusion criteria will be systematically implemented for this group. DBT Therapist Sample Inclusion criteria: 1. Currently practicing or having completed (or recently finished, within the past 12 months) a comprehensive DBT programme as a DBT therapist. In order to practice as a DBT therapist, they must hold a professional qualification recognised by appropriate healthcare regulators. 2. Having experience working with at least one LGBTQ+ client in DBT, who was aged between 13 and 21 years at the time. 3. Being willing and able to participate in the study.