DBT was initially formulated as a treatment for Borderline Personality Disorder (BPD) which is typically characterised by patterns of emotional and behavioural dysregulation that often manifests in self-harm and suicidal ideation. DBT is noted to be an intervention with a growing evidence base that demonstrates its effectiveness in treating individuals with BPD. More than a dozen controlled trials have been completed at multiple independent sites. The results of these trials have reported a reduction in suicidal behaviours, inpatient hospitalisations, depression, hopelessness and suicidal ideation among other constructs which individuals with BPD experience.