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New treatment option for Circadian Rhythm
Official title Circadian Timing and Time Perception in Healthy Adults
ClinicalTrials.gov ID: NCT07292597
What this study is testing
- What it's testing
- This study examines how a person's natural daily rhythm ("chronotype") affects the way time is experienced and judged. Healthy Danish-speaking adults (23-45 years) who are clearly morning-type or evening-type will complete two lab sessions in a crossover design: one at their preferred time of day (e.g., morning for morning-types) and one at the opposite time (misaligned).
- Which group you join is decided by chance.
A plain-language read of the study's public ClinicalTrials.gov listing. The study team confirms the details.
Who can take part
Ages 23 to 45. Healthy volunteers may be eligible.
You may be able to join if
- Aged 23 to 45 years
- Able to understand and communicate in Danish
- Completed at least upper secondary education (e.g., gymnasium)
- Categorized as either a Morning Type (MT) or Evening Type (ET) based on standardized chronotype assessments:
- Munich Chronotype Questionnaire (MCTQ):
You likely can't join if
- Current engagement in shift work, rotating schedules, or other forms of irregular sleep-wake timing
- Diagnosis of any neurological, psychiatric, or sleep-related disorder (e.g., insomnia, narcolepsy, sleep apnea)
- Use of medications that affect sleep, alertness, or circadian functioning (e.g., melatonin, stimulants, antidepressants)
- International travel across time zones within the four weeks preceding study participation
- Are classified as having an intermediate chronotype based on validated chronotype assessments (MCTQ or MEQ), as this group does not provide the...
See the full eligibility criteria
- Aged 23 to 45 years
- Able to understand and communicate in Danish
- Completed at least upper secondary education (e.g., gymnasium)
- Categorized as either a Morning Type (MT) or Evening Type (ET) based on standardized chronotype assessments:
- Munich Chronotype Questionnaire (MCTQ):
- MT: sleep midpoint on free days (MSFsc) ≤ 03:00
- ET: sleep midpoint on free days (MSFsc) ≥ 05:00
- Morningness-Eveningness Questionnaire (MEQ):
- One of four defined chronotype categories (definitely morning, moderately morning, moderately evening, definitely evening).
- Current engagement in shift work, rotating schedules, or other forms of irregular sleep-wake timing
- Diagnosis of any neurological, psychiatric, or sleep-related disorder (e.g., insomnia, narcolepsy, sleep apnea)
- Use of medications that affect sleep, alertness, or circadian functioning (e.g., melatonin, stimulants, antidepressants)
- International travel across time zones within the four weeks preceding study participation
- Are classified as having an intermediate chronotype based on validated chronotype assessments (MCTQ or MEQ), as this group does not provide the necessary contrast to evaluate circadian alignment effects.
The study team makes the final eligibility decision.
Where it's taking place
- Aarhus, Denmark
Questions & answers
Do participants get paid in this trial?
This listing doesn't specify compensation. Many trials still reimburse travel or offer a stipend, so it's worth asking the study team when you connect.
Is it free to join, and do I need insurance?
Searching and applying through BridgeMD is free. In clinical trials the study-related treatment and visits are generally provided at no cost to you. You usually don't need insurance to take part - confirm specifics with the study team.
How long does this study last?
The listing doesn't state an exact length. The study team walks you through the schedule and number of visits before you decide to enroll.
Who can join this trial?
This study is enrolling all sexes, 23 years to 45 years. Healthy volunteers may be eligible. The study team makes the final eligibility decision.
Where is this trial taking place?
Study sites include Aarhus, Denmark. Enter your location above to see the nearest site and check your eligibility.
Explore other conditions
BridgeMD is an information and trial-matching tool - not medical advice, and not the study sponsor. Details come from ClinicalTrials.gov; the study team decides eligibility.