None listed
Conditions
Brief summary
This project aims to discover the contribution of certain mechanisms of action within sleep restriction therapy for insomnia disorder. Insomnia disorder can be treated by the use of Cognitive Behavioural Therapy for insomnia (CBT-I). Within this Sleep Restriction Therapy is considered a key component. Yet, a lack of evidence exists to determine the mechanisms of action within this treatment option. Therefore, this study will look to examine changes in the contribution of certain sleep-wake mechanisms. Namely, the circadian drives for sleep and the homeostatic sleep drive or ‘pressure’ for sleep. In addition, we will also look to measure subjective changes in the perception of sleep through questionnaire response.
Interventions
Sleep Restriction Therapy for Insomnia Disorder -
Initially, the first treatment session (one hour face to face with researcher at the Woolcock Institute) involves a managed reduction of time in bed in line with the average subjective total sleep time derived from a one week sleep diary. But with no less than five hours total time in bed.
Participants are instructed to keep a stable bedtime and wake-up time for the length of the intervention. The researcher will come up with a "sleep window" t
Sleep Restriction Therapy for Insomnia Disorder - Initially, the first treatment session (one hour face to face with researcher at the Woolcock Institute) involves a managed reduction of time in bed in line with the average subjective total sleep time derived from a one week sleep diary. But with no less than five hours total time in bed. Participants are instructed to keep a stable bedtime and wake-up time for the length of the intervention. The researcher will come up with a "sleep window" that is approved by the participant. This sleep window will be evaluated every week for six weeks via telephone. Time in bed may be modified at weekly intervals by the achievement of 90% sleep efficiency (SE) = Total sleep time / Time in bed * 100) from a one week sleep diary (15 - 30 minute session per week via telephone). If 90% SE is achieved on average for any week of the therapy then Time in Bed is expanded by 15 minutes (either at bedtime or in the morning, depending on the participant). If <85% SE is achieved Time in bed is reduced by 15 minutes (but not if it is at the minimum of five hours). If SE = 85-90% Time in bed is held constant. The intervention will end after six weeks of this treatment
Sponsors
University of Sydney
Study design
Allocation
Non-randomised trial
Intervention model
Single group
Primary purpose
Treatment
Masking
Open (masking not used)
Eligibility
Sex/Gender
All
Age
25 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
1. Symptoms of Insomnia Disorder as diagnosed by the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria for insomnia disorder (APA, 2013) specifically: Difficulty initiating or maintaining sleep or waking up too early for at least 3 nights per week, for at least 3 months, with adequate opportunity and circumstances for sleep 2. Stable sleep/wake schedule with no shift work 3. Able to give informed, written consent 4. Fluent speaker of English 5. Referred by a sleep physician to have a routine sleep study as part of Medicare
Exclusion criteria
1. Active illicit substance use or alcohol dependence 2. Psychiatric disorders, other than mild to moderate depression (on the Depression Anxiety Stress Scales) 3. Previous history of depressive episode 4. Sleep disorders (other than insomnia) 5. Learning disabilities 6. Dementia 7. Neurological problems 8. Pregnancy or lactation
Outcome results
None listed