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  • Title: Randomized Controlled Trial of Imagery Rehearsal for Posttraumatic Nightmares in Combat Veterans.
    Author: Harb GC, Cook JM, Phelps AJ, Gehrman PR, Forbes D, Localio R, Harpaz-Rotem I, Gur RC, Ross RJ.
    Journal: J Clin Sleep Med; 2019 May 15; 15(5):757-767. PubMed ID: 31053215.
    Abstract:
    STUDY OBJECTIVES: To examine the efficacy of imagery rehearsal (IR) combined with cognitive behavioral therapy for insomnia (CBT-I) compared to CBT-I alone for treating recurrent nightmares in military veterans with posttraumatic stress disorder (PTSD). METHODS: In this randomized controlled study, 108 male and female United States veterans of the Iraq and Afghanistan conflicts with current, severe PTSD and recurrent, deployment-related nightmares were randomized to six sessions of IR + CBT-I (n = 55) or CBT-I (n = 53). Primary outcomes were measured with the Nightmare Frequency Questionnaire (NFQ) and Nightmare Distress Questionnaire (NDQ). RESULTS: Improvement with treatment was significant (29% with reduction in nightmare frequency and 22% with remission). Overall, IR + CBT-I was not superior to CBT-I (NFQ: -0.12; 95% confidence interval = -0.87 to 0.63; likelihood ratio chi square = 4.7(3), P = .2); NDQ: 1.5, 95% confidence interval = -1.4 to 4.4; likelihood ratio chi square = 7.3, P = .06). CONCLUSIONS: Combining IR with CBT-I conferred no advantage overall. Further research is essential to examine the possibly greater benefit of adding IR to CBT-I for some subgroups of veterans with PTSD. CLINICAL TRIAL REGISTRATION: Registry: ClinicalTrials.gov; Title: Cognitive Behavioral Therapy (CBT) for Nightmares in Operation Enduring Freedom/Operation Iraqi Freedom (OEF/OIF) Veterans; Identifier: NCT00691626; URL: https://clinicaltrials.gov/ct2/show/NCT00691626.
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