What Difficulties Do Children and Adolescents Experience in Everyday Activities After a Traumatic Event? Focus Groups and Delphi Survey for the Development of a Questionnaire on PTSD-related Functional Impairment

Inclusion Criteria:

The same inclusion criteria apply for the focus group discussions and for the Delphi process.

For children and adolescents:

• Children and adolescents, who experienced at least one PTE according to the DSM-5definition of a traumatic event.

• The PTE(s) must have occurred after the fourth birthday.

• The PTE(s) must have occurred at least 1 month ago.

• Children and adolescents must be 7-18 years of age.

• Children and adolescents are either in trauma-focused treatment at the time ofrecruitment or they present with at least a moderate PTSS severity according to theChild and Adolescents Trauma Screen 2 (CATS-2) Self-report.

• Children and adolescents must have sufficient command of the German language,excluding a small group of 4-5 unaccompanied refugee adolescents who will also beincluded. This group will be assisted by an interpreter.

• The children and adolescents do not have any physical impairment due to injuries orsomatic illnesses (self-assessment).

• The children and adolescents are not acute suicidal. The responsiblepsychotherapists or supervisors of the "Schlupfhuus" will provide information aboutit.

For caregivers:

• Caregivers of children and adolescents, who experienced at least one PTE accordingto the DSM-5 definition of a traumatic event.

• The PTE(s) must have occurred at least 1 month ago.

• The child or adolescent must be between 1-18 years of age.

• Children and adolescents are either in trauma-focused therapy at the time ofrecruitment or they present with at least a moderate PTSS severity according to theChild and Adolescents Trauma Screen 2 (CATS-2).

• Caregivers must have sufficient command of the German language.

• The children and adolescents do not have any physical impairment due to injuries orsomatic illnesses (self-assessment).

• The children and adolescents are not acute suicidal. The responsiblepsychotherapists or supervisors of the "Schlupfhuus" will provide information aboutit.

For clinical experts:

• Clinician or researcher specialized in trauma and PTSD in children and adolescents.

• Clinical experts must have sufficient command of the English language.

Exclusion Criteria:

• For children and adolescent participants:

• Children and Adolescents who have not experienced at least one PTE according tothe DSM-5 definition of a traumatic event.

• The PTE(s) occurred before the fourth birthday.

• The PTE(s) occurred less than 1 month ago.

• Children and adolescents that are younger than 7 years old and older than 18years old.

• Children and adolescents that are neither in trauma-focused therapy at the timeof recruitment nor meet the CATS-2 score for moderate PTSS severity or higher.

• Children and adolescents that do not have sufficient command of the Germanlanguage.

• Children and adolescents that have physical impairment due to injuries orsomatic illnesses (self-assessment).

• Children and adolescents that are acute suicidal. The responsiblepsychotherapists or supervisors of the "Schlupfhuus" will provide informationabout it.

For caregivers:

• Caregivers of children or adolescents who have not experienced at least one PTEaccording to the DSM-5 definition of a traumatic event.

• The PTE(s) occurred less than 1 month ago.

• The child or adolescent is younger than 1 year old or older than 18 years old.

• The child or adolescent is neither in trauma-focused therapy at the time ofrecruitment nor meets the CATS-2 score for moderate PTSS severity or higher.

• Caregivers that do not have sufficient command of the German language.

• Children and adolescents that have physical impairment due to injuries or somaticillnesses (self-assessment).

• Children and adolescents that are acute suicidal. The responsible psychotherapistsor supervisors of the "Schlupfhuus" will provide information about it.

For clinical experts:

• Clinical experts that don't work as clinician or as researcher specialized in traumaand PTSD in children and adolescents.

• Clinical experts that do not have sufficient command of the English language.

All the participants' informed consent must be obtained before any data is collected.