The Effects of a Digital, Transdiagnostic, Clinically and Peer-Moderated Treatment Platform for Young People With Emerging Mental Health Complaints: Repeated Measures Within-Subjects Study

Marilon van Doorn   ^{1, 2} , MSc ;   Anne Monsanto   ^{1, 3} , MSc ;   Chen Lu Wang   ¹ , BSc ;   Sander C J Verfaillie   ^{1, 4} , PhD ;   Thérèse A M J van Amelsvoort   ⁵ , Prof Dr ;   Arne Popma   ¹ , Prof Dr ;   Monique W M Jaspers   ⁶ , Prof Dr ;   Ferko Öry   ⁷ , Dr med ;   Mario Alvarez-Jimenez   ^{8, 9} , Prof Dr ;   John F Gleeson   ¹⁰ , Prof Dr ;   Dorien H Nieman   ¹ , Dr med

¹ Amsterdam University Medical Centers (Location AMC), Amsterdam, Netherlands

² Amsterdam Public Health Research Institute, Amsterdam, Netherlands

³ Antes, Rotterdam, Netherlands

⁴ GGZ inGeest Specialized Mental Health Care, Amsterdam, Netherlands

⁵ Department of Psychiatry and Neuropsychology, Maastricht University, Maastricht, Netherlands

⁶ Department of Medical Informatics, Amsterdam Public Health Research Institute, Amsterdam University Medical Centers (Location AMC), Amsterdam, Netherlands

⁷ Buurtzorg Jong, Almelo, Netherlands

⁸ Centre for Youth Mental Health, The University of Melbourne, Melbourne, Australia

⁹ Orygen, Melbourne, Australia

¹⁰ Healthy Brain and Mind Research Centre and School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Australia