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Comment & Response
July 2018

Written Exposure Therapy vs Cognitive Processing Therapy

Author Affiliations
  • 1Department of Psychosomatics and Psychotherapy, University of Giessen, Giessen, Germany
  • 2Department of Psychology, MSB Medical School Berlin, Berlin, Germany
JAMA Psychiatry. 2018;75(7):757. doi:10.1001/jamapsychiatry.2018.0807

To the Editor Sloan and colleagues1 reported noninferiority of 5-session written exposure therapy (WET) to 12-session cognitive processing therapy (CPT) in patients with posttraumatic stress disorder (PTSD). However, several aspects of the study require some clarification. First, was researcher allegiance controlled for? Written exposure therapy and CPT were carried out by the same therapists who were supervised by 2 of the authors. Second, the value of a noninferiority or equivalence study depends on how well the equivalence margin can be justified.2

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