“…Associations between circadian preferences, sleep quality, dissociation, post-traumatic cognitions, and post-traumatic stress disorder (PTSD) among incarcerated offenders (Germain, Buysse, Shear, Fayyad, & Austin, 2004;Germain, Hall, Krakow, Katherine Shear, & Buysse, 2005;Krakow et al, 2004;Krakow et al, 2001;Krakow et al, 2006;Williams, Collen, Orr, Holley, & Lettieri, 2015). Sleep disturbances contribute to manifestation of a more complicated clinical expression of symptoms in PTSD, such as comorbid depression (Krakow et al, 2000), psychiatric distress (Krakow et al, 2007), heightened suicidality and self-injurious behavior (Betts, Williams, Najman, & Alati, 2013;Malik et al, 2014;Pigeon, Pinquart, & Conner, 2012;Short, Ennis, et al, 2015), greater anxiety sensitivity (Babson, Boden, Woodward, Alvarez, & Bonn-Miller, 2013), increased alcohol and drug use (Nishith, Resick, & Mueser, 2001;Saladin, Brady, Dansky, & Kilpatrick, 1995;Short, Babson, Boden, & Bonn-Miller, 2015), and decreased quality of life and functioning (Clum, Nishith, & Resick, 2001;Giosan et al, 2015;Krakow, Melendrez, Johnston, et al, 2002;Short, Allan, & Schmidt, 2017). Poor sleep can significantly contribute to next day affective deterioration, such as increased PTSD symptoms and negative affect (Short et al, 2017;Short et al, 2016).…”