“…The population study done by Kessler et al (2006) demonstrated that individuals with ADHD have a probability of developing other disorders varying from 2.7 to 7.5 for mood disorders, 1.5 to 5.5 for anxiety disorders, and 1.5 to 7.9 for substance disorders. Other studies have also shown that ADHD symptoms are related to depression (Semeijn et al, 2015; Van Eck, Morse, & Flory, 2018) and anxiety (Jacob et al, 2007; Jarret, 2016; Jarrett & Ollendick, 2008; Mitchison & Njardvik, 2019). ADHD in childhood is linked as a risk factor for adult drug use (e.g., Charach, Yeung, Climans, & Lillie, 2011; Groenman et al, 2013; Lee, Humpherys, Flory, Liu, & Glass, 2011).…”