- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05943626
Circadian Intervention to Improve Cardiometabolic Health (TOCS)
Timing of Circadian Synchronizers: The TOCS Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The study is a randomized controlled trial with control and circadian intervention groups. Group allocation will be blinded to research staff and participants until the conclusion of the baseline segment. The circadian intervention group will receive counseling and instruction to reduce evening and nighttime light exposure, increase morning room light and sunlight exposure, and complete all food consumption at least 4 hours before bedtime. Participants randomized to control will maintain their habitual food intake and sleep habits in their home environment for ~8 weeks. Both groups will have equal contact time with the study team.
Prior to enrollment participants will complete an clinical overnight sleep disorders screening. Baseline consists of an ~1-week ambulatory real-world monitoring segment. Following baseline participants will be randomized to the control or intervention groups for the 8 week experimental segment. Throughout the study sleep duration will be monitored using an actiwatch wrist-device and a daily electronic sleep log. At the end of the baseline and experimental segments participants will complete overnight laboratory visits to assess insulin sensitivity and circadian timing by oral glucose tolerance test and dim light melatonin onset, respectively.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Christopher M Depner, PhD
- Phone Number: 801-581-2275
- Email: christopher.depner@utah.edu
Study Locations
-
-
Utah
-
Salt Lake City, Utah, United States, 84112
- Recruiting
- College of Health Research Complex--University of Utah
-
Contact:
- Christopher Depner
- Phone Number: 801-581-2275
- Email: sleepstudyparticipant@utah.edu
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Age: 18-45 years old; equal numbers of men and women
- Body mass index (BMI): 25.0-34.9 kg/m2,
- Sleep Habits: habitual self-reported average total sleep time (TST) <6.5 hours per night for prior 6 months
Exclusion Criteria:
- Clinically diagnosed sleep disorder or major psychiatric illness
- Evidence of significant organ dysfunction or disease (e.g., diagnosed diabetes, cardiovascular disease, or kidney disease)
- Use of prescription drugs or substances known to influence sleep or glucose metabolism
- Shift-work: current or history of within last year
- Weight change: >10% of body weight over prior six months
- Experiencing menopause or post-menopausal
- Current enrollment in weight loss or physical activity program like the Diabetes Prevention Program
- Currently pregnant or planning to become pregnant, or currently lactating.
- Currently smoking
- Alcohol intake >3 drinks per day or >14 drinks per week
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: Control Group
Provided with general health information on diet and physical activity.
|
|
Experimental: Intervention Group
Circadian-based intervention focused on timing of light exposure and food intake.
|
The circadian intervention group will receive counseling and instruction to reduce evening and nighttime light exposure, increase morning room light and sunlight exposure, and to finish all food consumption at least 4 hours before bedtime.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Insulin sensitivity change from baseline
Time Frame: Change from baseline to end of the ~8 week experimental segment
|
Oral Glucose Tolerance Test (OGTT), Matsuda Index
|
Change from baseline to end of the ~8 week experimental segment
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Timing of central circadian clock change from baseline
Time Frame: Change from baseline to end of the ~8 week experimental segment
|
Quantified as dim-light melatonin onset from salivary melatonin samples
|
Change from baseline to end of the ~8 week experimental segment
|
Plasma ceramides change from baseline
Time Frame: Change from baseline to end of the ~8 week experimental segment
|
Fasting plasma samples will be analyzed for plasma ceramides using targeted metabolomics
|
Change from baseline to end of the ~8 week experimental segment
|
Average (per week) nightly total sleep time change from baseline
Time Frame: Analyzed as change from baseline for each week of the ~8 week experimental segment
|
Analyzed by wrist-actigraphy
|
Analyzed as change from baseline for each week of the ~8 week experimental segment
|
Average (per week) sleep satisfaction change from baseline
Time Frame: Analyzed as change from baseline for each week of the ~8 week experimental segment
|
5 point likert scale on daily sleep log (1 = very good; 5 = very poor)
|
Analyzed as change from baseline for each week of the ~8 week experimental segment
|
Average (per week) self-reported sleep duration change from baseline
Time Frame: Analyzed as change from baseline for each week of the ~8 week experimental segment
|
Daily electronic sleep logs will be used to track sleep and waketimes during the ambulatory monitoring phases of the study
|
Analyzed as change from baseline for each week of the ~8 week experimental segment
|
Average (per week) timing of food intake change from baseline
Time Frame: Change from baseline to week 8 of the ~8 week experimental segment
|
Time of day 50% of calories are consumed collected by picture based food diaries.
Average per week will consist of 2 weekdays and 1 weekend day for baseline and final week of intervention
|
Change from baseline to week 8 of the ~8 week experimental segment
|
Average (per week) daytime alertness change from baseline
Time Frame: Analyzed as change from baseline for each week of the ~8 week experimental segment
|
5 point likert scale on daily sleep log (1= most alert; 5 = not alert at all)
|
Analyzed as change from baseline for each week of the ~8 week experimental segment
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 22-60
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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