A Transdiagnostic Mentalization-based Intervention for Parents With Mental Disorders

The aim of this randomised clinical trial is to evaluate the short and longterm effects of a transdiagnostic mentalization-based intervention (Lighthouse MBT Parenting Program) compared to care as usal (CAU) for parents with a mental disorder in adult mental health service.

According to the World Health Organization (WHO), 970 million people worldwide suffer from mental disorders, many of whom are parents. Cross-sectional studies indicate that between 15-55% of the patients attending adult mental health service (AMHS) are parents. In Denmark, about 430.000 children have at least one parent with a mental disorder.

Parental mental health problems have a detrimental impact on parenting, leading to long-term negative consequences for their children. Robust evidence shows that children of parents with mental disorders have an elevated risk of various adverse outcomes and events, such as developing a mental disorder themselves and exposure to child maltreatment, compared to children of healthy unaffected parents, suggesting an intergenerational transmission of adversity from parent to child. Mental disorders in parents thus leaves deep traces throughout their children's' lives and entails major socio-economic consequences. Given the high prevalence and substantial burden of parental mental disorders, there is an urgent need for evidence-based interventions targeting the specific needs of this population to prevent the adverse impact on their children. Despite this, the existing services in AMHS for parents with mental disorders are insufficient, and not evidence based. The present trial seeks to fill in this gap.

This is an investigator-initiated single-center, two-arm, parallel group randomized clinical trial testing for superiority of a transdiagnostic mentalization-based intervention (Lighthouse MBT Parenting Program) versus care as usual in 170 parents with various mental disorders. The experimental intervention and active control group intervention are delivered as an add-on to the participants' outpatient treatment.

Participants will be recruited from the outpatient clinics at Psychotherapy Centre Stolpegaard (PCS), Capital Region of Denmark. Participants will be included if they comply with the eligibility criteria. Participants will be assessed at baseline, and at 6, 12, and 24 months follow-up after randomization.

Eligibility Criteria:
Inclusion Criteria exclusive to the Outpatient Clinic

* Age \>18 years
* Seeking treatment for one of the following non-psychotic disorders according to ICD-10: obsessive-compulsive disorder and anxiety disorders (F40-42), posttraumatic stress disorder (DF43), personality disorders (F60-61), or one of the previous disorders and a drug-or alcohol related disorder (F10-19) (i.e. 'dual diagnosis disorder')

Inclusion Criteria exclusive to the trial:

* Parent of at least one child aged 0-17 years of age at baseline
* Fluent i.e., sufficient Danish language skills
* Parent is living with child or is in regular contact (min. 5 days monthly)
* Written informed consent

Exclusion Criteria exclusive to the Outpatient Clinic:

* Possibility of a learning disability (IQ\<75)
* A diagnosis of schizotypal personality disorder or antisocial personality disorder
* Presence of a comorbid psychiatric disorder that requires specialist treatment elsewhere
* Concurrent psychotherapeutic treatment outside the clinic

Exclusion Criteria exclusive to the trial:

* Acute suicidal risk or state of crises
* Lack of informed consent
* Acute child endangerment
* Participation in another parenting focused intervention simultaniously