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Circadian Rhythm Timing and Associations With Sleep Symptoms in People With Insomnia
Body Clock Timing and Its Link to Sleep Problems in People with Insomnia
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Abstract
In 128 participants diagnosed with insomnia disorder, a longer phase angle between and sleep onset time was linked to a mean difference of 43.21 minutes in sleep latency.
- Dim-light melatonin onset (DLMO) timing is associated with sleep timing in individuals with insomnia.
- There are positive correlations between DLMO timing and sleep onset time, with correlation coefficients ranging from r = 0.27 to 0.37.
- A longer phase angle (greater than 3 hours) between DLMO and sleep onset time is linked to longer sleep latencies and shorter sleep durations.
- Participants with a phase angle less than 2 hours experienced shorter sleep latencies and longer sleep durations compared to those with longer phase angles.
- No consistent associations were found between other phase angles (DLMO and mid-sleep, wake time) and sleep continuity.
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Key numbers
43.21 min
Sleep Latency Increase
Mean difference in sleep latency for > 3 h subgroup vs. < 2 h subgroup.
-65.66 min
Sleep Duration Decrease
Mean difference in sleep duration for > 3 h subgroup vs. < 2 h subgroup.
21:11 hours
Timing Mean
Mean timing reported in the study.