Research
Mixed
Sleep interventions, particularly Cognitive Behavioral Therapy for Insomnia (CBT-I), reduce sleep/wake intraindividual variability (IIV), suggesting that stabilizing sleep patterns is a key mechanism of these treatments.
If you are treating insomnia, expect that your sleep will become more consistent, not just longer. Treatments like CBT-I work by stabilizing your sleep schedule, reducing the day-to-day chaos of your sleep patterns.
GoodSupportsHIGH confidence
symptoms of insomnia and poor sleep were associated with higher sleep/wake IIV, which was reduced following sleep interventions.
Why this rating
Based on multiple studies included in the review showing reduction in IIV post-intervention.
Source
Beyond the mean: A systematic review on the correlates of daily intraindividual variability of sleep/wake patterns
Bei Bei et al. · Sleep Medicine Reviews · 2015
DOI 10.1016/j.smrv.2015.06.003
systematic_reviewCited 429×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Greater day-to-day intraindividual variability (IIV) in sleep/wake patterns (timing, duration, quality) is consistently associated with poorer physical and mental health outcomes, including higher BMI, obesity, chronic disease, depression, and stress, independent of mean sleep values.Good
- Younger age is consistently associated with greater variability in sleep timing (bedtime and wake time), while older age is associated with less variable sleep patterns.Good
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