A Randomised Controlled Trial of Cognitive Behavioural Therapy for Insomnia (CBT-I) and Imagery Rehearsal Therapy (IRT) for Ex-Service Personnel with Insomnia and Nightmares in the Context of Posttraumatic Stress Disorder (PTSD) and Obstructive Sleep Apnoea (OSA)


The primary aim of this study is to determine whether the addition of imagery rehearsal therapy (IRT) to cognitive behavioural therapy for insomnia (CBT-I) improves sleep quality in ex-service personnel with posttraumatic stress disorder (PTSD), insomnia, and nightmares compared to CBT-I alone. This study also aims to explore if obstructive sleep apnoea (OSA) negatively moderates treatment outcomes in ex-service personnel receiving either CBT-I or CBT-I+IRT. Furthermore this study aims to validate OSA screening tools in ex-service personnel with PTSD, to determine the clinical feasibility of combining CBT-I with IRT in a group setting, and to explore changes to objective sleep parameters measured by polysomnography and actigraphy following treatment. Participants will be a minimum of 90 ex-serving Australian Defence Force personnel with PTSD, insomnia, and nightmares. Eligible participants will be randomised to either CBT-I or CBT-I+IRT treatment groups and will attend 8 x weekly 60 minute CBT-I group sessions or 8 x weekly 120 minute CBT-I+IRT group sessions. Treatment sessions will be facilitated by two registered psychologists. Participants will complete a series of outcome measures at three time points (baseline, post-intervention, and at three months post-intervention). It is expected that the addition of IRT to CBT-I treatment will result in greater reduction in sleep disturbances than treatment with CBT-I alone.


Recruitment website: survey.websurveycreator.com/s/EOI-SleepStudy