“…We identified the need for such a review through a survey of the extant systematic reviews on sleep and/or circadian rhythms and ADHD via the Prospero and Cochrane registers of existing reviews in this field (supplementary material). The existing literature reviews in this topic either narrowly concentrate upon discussing possible treatment strategies and therapeutic approaches (Alamar et al, 2015; Bioulac et al, 2015; Cortese et al, 2013; Hvolby et al, 2015; Nikles et al, 2020; Tsai et al, 2016), or review the relationships between specific sleep features and ADHD in smaller systematic reviews focused on specific sleep feautres (Martin et al, 2019; Mogavero et al, 2018; Polmann et al, 2020; Sadeh et al, 2006; Martins et al, 2019; Scarpelli et al, 2019; Walters et al, 2008). Further, a number of reviews focus generally on the pharmacotherapy of ADHD, and as such sleep issues are of secondary interest in these works (Abdelgadir et al, 2018; Cortese et al, 2018; Krinzinger et al, 2019; Punja et al, 2016; Storebø et al, 2016, 2018).…”