“…Adherence to treatment by adolescents has been found to be connected to factors such as self-regulation skills ( Berg et al, 2014 ; Graziano et al, 2011 ; Miller et al, 2020 ) and the perceived threat of physical disease affecting mental well-being ( Kyngäs, 2007 ). Demographic variables such as age, gender, and parents' educational level have received mixed results, with some studies finding connections to adherence and some not (see, e.g., Calear et al, 2013 , Christensen et al, 2009 , Garrido et al, 2019 , Kristensen et al, 2018 , Marko-Holguin et al, 2010 , Mattila et al, 2016 , Neil et al, 2009 , Williams et al, 2006 ).…”