“…Several scales, such as the Comfort Scale (CS) (Ambuel et al, 1992), the Comfort Behaviour Scale (CBS) (Ista et al, 2005) and the State Behavioural Scale (SBS) (Curley et al, 2006), have been published, and many articles have explored the effects of these scales. For example, one study used the CS to evaluate sedation in children (Tschiedel, Muller, Schara, Felderhoff-Muser, & Dohna-Schwake, 2015), whereas another used the CBS (Andersen et al, 2014). Most of the systematic reviews studying these scales showed that evaluation of pain and sedation in the paediatric ICU patient population is challenging (De Jonghe et al, 2000;Harris et al, 2016;Hartman et al, 2009;Vet et al, 2013).…”