Impulsivity as a multifactorial construct and its relationship to PTSD severity and threat sensitivity. (November 2020)

• Record Type: Journal Article
• Authors: Young, Dmitri A.; Neylan, Thomas C.; Zhang, Huaiyu; O'Donovan, Aoife; Inslicht, Sabra S.
• Is Part Of: Psychiatry research. Volume 293(2020)
• Publication Date: 2020-11
• Subjects: Impulsivity -- PTSD/Posttraumatic stress disorder -- Startle -- Trauma -- Biological markers -- Psychophysiological response; Psychiatry -- Periodicals; Psychiatry -- periodicals; Psychiatrie -- Périodiques; 616.89
• DOI: 10.1016/j.psychres.2020.113468
• Languages: English
• ISSNs: 0165-1781

Abstract

Highlights: PTSD severity was associated with overall impulsivity and behavioral impulsivity. PTSD severity was not associated with cognitive impulsivity. Cognitive and behavioral impulsivity were both associated with threat sensitivity. Clinical implications are discussed. Abstract: Changes to the DSM-5′s conceptualization of posttraumatic stress disorder (PTSD) highlight the importance of impulsivity within the context of PTSD-related arousal dysregulation. While the relationship between PTSD and threat sensitivity is well defined, how they relate to impulsivity remains understudied. We examined the relationship between PTSD symptom severity, threat sensitivity, and impulsivity. 124 participants completed the PTSD Checklist (PCL-C) and the Barratt Impulsiveness Scale 11th ed (BIS-11). BIS-11 items were separated to define cognitive and behavioral impulsivity subdomains. A trauma-exposed subsample of 39 participants were also exposed to no, ambiguous, and high threat conditions in a threat-enhanced acoustic startle paradigm with psychophysiological response as the outcome variable. PTSD severity was significantly associated with greater overall impulsivity and behavioral impulsivity. Greater overall impulsivity and both cognitive and behavioral impulsivity subdomains were significantly associated with psychophysiological magnitudes across threat conditions in the traumatized subsample. Our results suggest PTSD severity may linked to behavioral impulsivity and both cognitive and behavioral impulsivity are associated with threat sensitivity and hyperarousal. Assessing impulsivity within the context of PTSD, particularly in terms of its cognitive and behavioral subdomains, may provide important, clinically relevant information.