Scientists probe the body clock to unravel sleep delay mystery

NCT ID NCT06471374

Recruiting now Knowledge-focused Sponsor: University of Colorado, Boulder Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study aims to understand what causes delayed sleep wake phase disorder (DSWPD), a condition where people's sleep times are shifted later. Researchers will compare 66 participants with DSWPD to healthy controls by measuring body temperature, melatonin, and thinking ability during a 66-hour lab stay. They will also test a new blood-based method to predict circadian rhythms.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this could lead to better ways to diagnose and understand delayed sleep phase disorder, possibly improving treatments.
What could go wrong: This is an observational study, not a treatment trial. It is small and early-stage, so findings may not lead to immediate clinical changes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

circadian rhythm sleep disorder circadian rhythm sleep disorder, delayed sleep phase type

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

DELAYED SLEEP PHASE DELAYED SLEEP PHASE SYNDROME

Contacts and locations

Locations

Northwestern University
RECRUITING

Chicago, Illinois, 60611, United States
University of Colorado
RECRUITING

Boulder, Colorado, 80303, United States

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