What is Sleep Diary?
CBT-I, or Cognitive Behavioral Therapy for Insomnia, is a structured sleep program that helps the brain and body relearn how to sleep. It is now recognized by the American College of Physicians as the first-line treatment for insomnia. CBT-I was originally developed for the treatment of chronic insomnia.
This worksheet captures one night of sleep data: bedtime and wake time. A daily sleep diary helps track and understand sleep patterns and treatment progress and shows areas that need more work. Sleep efficiency reflects the amount of time spent in bed asleep compared to amount of time spent in bed awake. Assigned daily for 1–2 weeks, the diary builds a record that reveals patterns in sleep onset, maintenance, and total sleep time.
How therapists use it
Introduce the sleep diary at the start of treatment or when sleep patterns are unclear. Ask the client to complete it each morning, recording the previous night's bedtime and wake time. After one to two weeks of diary entries, you and the client choose a sleep schedule based on the actual sleep patterns shown. Review the diary together in session to identify patterns—early waking, long sleep onset, fragmented sleep—and to calculate sleep efficiency. Use these findings to guide decisions about sleep restriction, stimulus control, or other CBT-I components.
Who it's for
The sleep diary suits adults with insomnia, particularly those with anxiety or depression. CBT-I is effective for people with insomnia and comorbid conditions, like depression and anxiety. It works best for clients who can track sleep consistently and tolerate a structured, measurement-based approach. The diary is less suitable for clients with severe cognitive impairment, active psychosis, or those unable to maintain a consistent sleep schedule. Sleep restriction, a core CBT-I technique informed by sleep diary data, is contraindicated in epilepsy, bipolar disorders, and those at high risk for falls.
What clients see
The client enters bedtime and wake time for the previous night. The diary may also capture naps, time to fall asleep, or nighttime awakenings, depending on the version. Data is recorded each morning and reviewed with the therapist to track progress and adjust the sleep schedule.
Modality fit
CBT uses behavioral monitoring and thought records to identify patterns and test beliefs. The sleep diary is a behavioral monitoring tool that reveals sleep patterns and sleep efficiency, which CBT-I uses to guide stimulus control, sleep restriction, and cognitive restructuring of sleep-related beliefs.
Sources
- Morin, C. M., Espie, C. A. (2003). Cognitive Behavior Therapy for Insomnia (CBT-I) — Sleep Diary protocols. Springer / Plenum Publishers
- Carney, C. E., Buysse, D. J., Ancoli-Israel, S., Edinger, J. D., Krystal, A. D., Lichstein, K. L., Morin, C. M. (2012). The Consensus Sleep Diary — Standardizing Prospective Sleep Self-Monitoring
Common questions
How long should a client keep a sleep diary?
Sleep restriction therapy usually begins with keeping a diary of sleep habits for one to two weeks to get a better understanding of sleep patterns. Assign it daily during this baseline period, then continue as needed to track progress.
What is sleep efficiency and why does it matter?
Sleep efficiency reflects the amount of time spent in bed asleep compared to amount of time spent in bed awake. Sleep efficiency is a central variable in both the delivery and titration of CBT-I. It guides decisions about adjusting the sleep window.
Can a sleep diary alone treat insomnia?
No. Homework is an important part of cognitive behavioral interventions and CBT-I is no different. Like any other skills, the strategies learned during CBT-I sessions require practice to become a habit. The diary is one tool within a multi-component treatment.
Is the sleep diary useful for clients with depression or anxiety?
CBT-I can help reduce symptoms of depression and anxiety. Guided online CBT-I is effective for insomnia complaints and also for depressive symptoms, with effects comparable to those of depression therapy.
What if a client cannot keep a consistent sleep schedule?
The diary still provides valuable data on current patterns. People with insomnia should evaluate or have their sleep patterns evaluated and take into account all possible factors affecting sleep ability. This may involve keeping a sleep diary for a couple of weeks, which can help identify patterns of thoughts or behaviors, stressors, etc.