The purpose of the study is to examine the effects of residential group and individual Trauma Informed Stabilization Treatment (TIST) for complex symptoms in adult survivors of childhood trauma in a naturalistic observational study.

Adult survivors of childhood trauma have complex and diverse symptom profiles. The aim of the study is to examine the effects of theTrauma Informed Stabilization Treatment (TIST) model, developed by dr Janina Fisher, in adult survivors of childhood trauma.

32 patients will be recruited from referrals to an residential open door trauma clinic in Norway, Modum Bad. Patients will be admitted for in-patient pre-planned treatment over 11 weeks - consisting of individual therapy and group therapy using different modalities, all within the TIST approach and framework. Patients will be summoned for 6 day follow-up 8 months after treatment.

Inclusion Criteria:

• Adults ≥18 years
• Complex symptom presentations connected to childhood trauma
• All patients will have undergone outpatient therapy with insufficient effect
• Most included patients will have a diagnosis of complex PTSD (diagnosed by M.I.N.I. and clinical evaluation)
• Patients may have diagnosis of unspecified dissociative disorder, personality disorders, depression and other comorbidity.

Exclusion criteria:

• Dissociative identitiy disorder
• Ongoing psychosis
• Ongoing drug addiction
• Very disturbed group function
• Ongoing life crisis
• Mental disability
• Acute suicidality
• Ongoing severe self harm
• Patients with complex dissociative disorders and patients eligible for exposure therapy will be referred to/prioritized for other treatment programmes.

Patients will be recruited from referrals to the clinic after assessment of eligibilty criteria.