1Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre of the Johannes Gutenberg-University, Mainz, Germany 2Institute of Psychology, Johannes Gutenberg-University, Mainz, Germany DOI 10.7717/peerj.18280 Academic Editor Oyelola Adegboye Subject Areas Epidemiology, Pediatrics, Public Health, Mental Health Keywords Chronic health conditions, School health, Mental health, Education, Paediatrics Copyright © Licence This is an open access article distributed...