“…It has been speculated that CPTSD represents a combination of PTSD and (DSM-IV) BPD symptoms given the high rates of comorbidity between these diagnoses (Cloitre, Garvert, Weiss, Carlson, & Bryant, 2014). In non-clinical samples, BPD/PTSD comorbidity has ranged from 2% to 32%, depending upon the use of current or lifetime diagnostic rates for PTSD (Grant et al, 2008;Pagura et al, 2010;Scheiderer, Wood, & Trull, 2015), while in clinical samples the rate of BPD/PTSD comorbidity is higher, ranging from 25% to 68% (Harned, Rizvi, & Linehan, 2010;Heffernan & Cloitre, 2000;Zanarini et al, 1998;Zlotnick, Franklin, & Zimmerman, 2002). Where attempts have been made to differentiate between CPTSD and BPD evidence suggests that CPTSD and BPD are distinct diagnostic entities.…”