Imagery rehearsal for posttraumatic nightmares: a randomized controlled trial

Area of Science:

• Psychiatry and Behavioral Sciences
• Trauma and PTSD Research
• Sleep Medicine

Background:

• Chronic, severe posttraumatic stress disorder (PTSD) significantly impacts veterans' quality of life.
• Combat-related nightmares are a distressing symptom of PTSD, often resistant to treatment.
• Imagery rehearsal therapy (IRT) is a potential intervention for managing trauma-related nightmares.

Purpose of the Study:

• To evaluate the efficacy of imagery rehearsal therapy (IRT) in treating combat-related nightmares in male Vietnam War veterans.
• To compare the effects of IRT versus an active comparison condition on nightmare frequency, sleep quality, and PTSD symptoms.

Main Methods:

• A randomized controlled trial involving 124 male Vietnam War veterans with chronic, severe PTSD.
• Participants were assigned to either imagery rehearsal (n=61) or an active comparison condition (n=63).
• The intervention consisted of six group-based sessions.

Main Results:

• Both groups showed pre-post improvements in overall sleep quality and PTSD symptoms.
• Neither group experienced a significant reduction in nightmare frequency.
• Imagery rehearsal did not yield significantly greater improvements than the comparison condition for primary outcomes (nightmare frequency, sleep quality) or secondary outcomes (PTSD symptoms).

Conclusions:

• Six sessions of group-based imagery rehearsal therapy were not effective in substantially improving chronic, severe PTSD or combat-related nightmares in Vietnam veterans.
• The findings suggest that IRT, in this format and duration, may not be a sufficient intervention for this population.
• Further research is needed to explore potential explanations for the lack of efficacy and alternative treatment approaches.