“…Recent studies have established high comorbidity rates between sleep disturbances and anxiety (Alfano et al, 2007;Spoormaker and van den Bout, 2005;Taylor et al, 2005), rates which vary across different anxiety disorders (Johnson et al, 2006). Longitudinal associations have also been established between sleep disturbances, anxiety, and depression (Baglioni et al, 2011;Fichter et al, 2009). Emerging research on this association in psychosis shows sleep disturbance to be a significant predictor of psychosis (Lunsford-Avery et al, 2013;Zanini et al, 2013), even when controlling for depression (Lee et al, 2012).…”