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Journal of Interpersonal Violence
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Duration of Exposure and the Dose-Response Model of PTSD

Debra Kaysen

University of Washington, dkaysen{at}u.washington.edu

Gerald Rosen

University of Washington

Marilyn Bowman

Simon Fraser University

Patricia A. Resick

VA Boston Healthcare System and Boston University

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.

Key Words: sexual assault • victimization • posttraumatic stress disorder • crime victims • rape • injuries

This version was published on January 1, 2010

Journal of Interpersonal Violence, Vol. 25, No. 1, 63-74 (2010)
DOI: 10.1177/0886260508329131
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