Complex-Posttraumatic Stress Disorder - Cultural Adaptation of a Therapeutic Manual and Development of a Culture-specific Diagnostic Module for Refugee Populations in Switzerland (Pilot Trial)

Feasibility of the ESTAIR manual will be evaluated via the percentage of users who who adhere to the therapy until the end (out of those who start the therapy). As general rule, 80-90% adherence is considered as excellent, 70-80% as satisfactory, and 60-70% as acceptable.

Feasibility will be examined based on the percentage of participants who complete the ITI. As general rule, 80-90% participation and adherence is considered as excellent, 70-80% as satisfactory, and 60-70% as acceptable.

Feasibility will be evaluated based on the percentage of participants who give their informed consent (out of those invited) and based on the percentage of participants who adhere to the study until the end (out of those who sign the informed consent). As general rule, 80-90% participation and adherence is considered as excellent, 70-80% as satisfactory, and 60-70% as acceptable.

Acceptability of the ITI will be assessed through qualitative interviews after the diagnostic interview. Content analysis will be used to extract the most important information related to acceptability.

Acceptability will be assessed through the qualitative interviews after each of the four modules. Content analysis will be used to extract the most important information related to acceptability.

Acceptability of the research procedures will be assessed through qualitative interviews at the end of the study. Content analysis will be used to extract the most important information related to acceptability.

International Trauma Interview. This interview evaluates 12 symptoms (6 for post-traumatic stress disorder and another 6 for disturbances in self-organisation). A diagnosis of complex post-traumatic stress disorder requires that the post-traumatic stress disorder criteria are satisfied (with a diminished startle response if hypervigilance or exaggerated startle are not present), and the endorsement of one of two symptoms from each of the three "disturbances in self-organisation" symptom clusters, plus endorsement of functional impairment associated with these symptoms. Endorsement of a symptom requires that it is trauma related, has been present for at least a year and scores > 2.

Patient Health Questionnaire (PHQ-9). The PHQ-9 score may range from 0 to 27, since each of the 9 items can be scored from 0 (not at all) to 3 (nearly every day). Higher scores mean higher levels of depression.

General Anxiety Disorder Questionnaire (GAD-7). The GAD-7 score may range from 0 to 21, since each of the 7 items can be scored from 0 (not at all) to 3 (nearly every day). Higher scores mean higher levels of anxiety.

Somatic Symptoms Scale (SSS-8). The SSS-8 score may range from 0 to 32, since each of the 8 items can be scored from 0 (not at all) to 4 (severely). Higher scores mean higher levels of anxiety.

WHO-5 questionnaire. Scores range from 0-25, with higher scores reflecting higher levels of well-being