Recruitment and therapy adherence
RECRUITMENT
Overall, 86 adolescents were screened for eligibility across an overall study duration of five years and four months. Of these 86, 41 (48%) could not be included: 24 (28%) declined participation in the screening process, eleven (13%) were excluded in the screening process because there was no indication. Six (7%) were excluded due to other reasons (e.g., postponement of appointments by the adolescent until recruitment stop). Forty-five adolescents (52% of screened individuals) agreed to participate in the study. Three (3%) participants were randomized and referred to TAU before design change of the study; they were defined as study determined drop-out and are, thus, not considered for calculation of therapy adherence, acceptance of scientific assessments and pre–post analyses.Of the remaining 42, four (10%) dropped out between diagnostic process and beginning of the intervention. Twenty-four (57%) completed the treatment. 14 (33%) dropped out during the intervention (for overview see flow diagram Fig. 