Duration of exposure and the dose-response model of PTSD.

University of Washington Medical School, Department of Psychiatry and Behavioral Sciences, Box 356560, Seattle,WA 98195-0650, USA.
Journal of Interpersonal Violence (Impact Factor: 1.64). 03/2009; 25(1):63-74. DOI: 10.1177/0886260508329131
Source: PubMed

ABSTRACT A dose-response model underlies posttraumatic stress disorder (PTSD) and posits a relationship between event magnitude and clinical outcome. The present study examines whether one index of event magnitude--duration of exposure--contributes to risk of PTSD among female victims of sexual assault. Findings support a small but significant contribution of event duration to clinical status in the immediate aftermath of trauma but not at 3-month follow-up. The opposite pattern is obtained for subjective appraisals of threat. These findings add to a growing literature that suggests that a simple application of the dose-response model to objective event characteristics may be insufficient to explain the risk of PTSD.


Available from: Debra Kaysen, May 25, 2015
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