This study will test whether measuring the circadian clock during treatment of delayed sleep-wake phase disorder results in greater improvements in sleep compared to estimating the circadian clock.
The study is a randomized, controlled, parallel double-blind 4-week trial of 0.5 mgs of exogenous melatonin timed to either 3 h before actual dim light melatonin onset (DLMO) based on in-home measurement (M-DLMO, n = 25) or 3 h before DLMO estimated at 2 h before average sleep onset time based on actigraphy and sleep diary (E-DLMO, n = 25) in adult participants with delayed sleep-wake phase disorder. All participants will receive melatonin 0.5 mgs. Outcomes include change in DLMO, subjective and objective sleep parameters, and daytime symptoms. As of January 7, 2020, the Insomnia Severity Index was removed from the IRB-approved protocol. No data were collected for this measure.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
44
Melatonin tablet
Test to determine the time of melatonin onset in saliva under dim light conditions
University of Michigan
Ann Arbor, Michigan, United States
Change From Baseline Time of Dim Light Melatonin Onset (DLMO) at 4 Weeks
Onset of melatonin in dim light conditions as measured in saliva (also called DLMO). Time of DLMO is measured in clock time and change in time of DLMO is measured in hours. The change score is calculated as time at 4 weeks minus baseline time. Thus, positive scores indicate a shift towards a later onset of melatonin and negative scores indicate a shift towards an earlier onset of melatonin.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Wrist Actigraphy and Self-Report Diary Sleep Diary Parameters - Total Sleep Time at 4 Weeks
Change in total sleep time is measured in hours. The change score is calculated by subtracting total sleep time at 4 weeks from total sleep time at baseline. Thus, positive scores indicate an increase in total sleep time, whereas negative scores indicate a decrease in total sleep time.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Wrist Actigraphy and Self-Report Diary Sleep Diary Parameters - Sleep Onset Time at 4 Weeks
Sleep onset time is measured in clock time and reflects time of falling asleep. The change score is calculated as time at 4 weeks minus baseline time. Thus, positive scores indicate a shift towards a later fall asleep time and negative scores indicate a shift towards an earlier fall asleep time.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Wrist Actigraphy and Self-Report Diary Sleep Diary Parameters - Sleep Offset Time at 4 Weeks
Sleep offset time is measured in clock time and reflects time of waking for the day. The change score is calculated as time at 4 weeks minus baseline time. Thus, positive scores indicate a shift towards a later wake time and negative scores indicate a shift towards an earlier wake time.
Time frame: After 4 weeks of melatonin therapy
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Change From Baseline Score on Wrist Actigraphy and Self-Report Diary Sleep Onset Latency at 4 Weeks
Length of time to sleep onset latency in minutes (reflects time to fall asleep). The change score is calculated as time at 4 weeks minus baseline time. Thus, a negative scores indicate a reduction in time to fall asleep, whereas positive scores indicate an increase in time to fall asleep.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Epworth Sleepiness Scale at 4 Weeks
Self-report of daytime sleepiness. Scores range from 0 to 24. Scores of 10 or higher indicate excessive daytime sleepiness. The change score is calculated as score at 4 weeks minus baseline score.Thus, positive scores indicate an increase in sleepiness, whereas negative scores indicate a reduction in sleepiness.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Multidimensional Fatigue Inventory at 4 Weeks
Self-report of daytime fatigue. Scores range from 20-100; higher scores indicate more fatigue. The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate an increase in fatigue, whereas negative scores indicate a reduction in fatigue.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Sheehan Disability Scale at 4 Weeks
Self-report of functional impairment in works/school, social, and family life. Scores range from 0-30; higher scores indicate more impairment. The change score is calculated as time at 4 weeks minus baseline time Thus, positive scores indicate increased impairment, whereas negative scores indicate a reduction in impairment.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Patient Health Questionnaire-9 at 4 Weeks
Self-report of depression symptoms. Scores range from 0-27; higher scores indicate more severe depression. The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate an increase in depression, whereas negative scores indicate a reduction in depression.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on Generalized Anxiety Disorder-7 Scale at 4 Weeks
Self-report of generalized anxiety symptoms. Scores range from 0-21; higher scores indicate more severe anxiety. The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate an increase in anxiety, whereas negative scores indicate a reduction in anxiety.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on the Pittsburgh Sleep Quality Index at 4 Weeks
Self-report of sleep quality. Seven subscale scores are summed to obtain a global score. Global scores range from 0 to 21; scores of 5 or higher indicate poor sleep quality. The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate a worsening of sleep quality, whereas negative scores indicate an improvement in sleep quality.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on the Morningness Eveningness Questionnaire at 4 Weeks
Self-report of chronotype. Scores range from 16-86. Lower scores indicate more eveningness.The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate a shift towards more morningness, whereas negative scores indicate a shift towards more eveningness.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on the PROMIS-Sleep Disturbance Scale at 4 Weeks
Self-report of sleep disturbances. Scores range from 8-40. Higher scores indicate greater sleep disturbance. The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate a worsening of sleep disturbance, whereas negative scores indicate an improvement in sleep disturbance.
Time frame: After 4 weeks of melatonin therapy
Change From Baseline Score on the PROMIS-Sleep Related Impairment Scale at 4 Weeks
Self-report of impairment related to sleep. Scores range from 8-40. Higher scores indicate greater impairment due to sleep. The change score is calculated as score at 4 weeks minus baseline score. Thus, positive scores indicate an increase in impairment due to sleep, whereas negative scores indicate a reduction in impairment due to sleep.
Time frame: After 4 weeks of melatonin therapy