CI

At a glance

ClinicalIndex Comparison Record
N/ACompleted· 142 enrolled
Drug / intervention
Increase morning bright light +3 moreother
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT03806296
NCT03806296N/ACompleted
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Delayed Sleep Phase and Risk for Adolescent Substance Use

University of Pittsburgh·interventional·Posted Jan 16, 2019·Updated Aug 26, 2025

In Brief

A clinical study evaluating Increase morning bright light, Decrease evening blue light, and 2 other interventions for Delayed Sleep Phase. Completed, enrolled 142 participants across 1 site.

Detailed Summary

This study will (1) comprehensively characterize the substance use disorder (SUD) risk profile associated with adolescent Delayed Sleep Phase (DSP), and (2) probe whether SUD risk is diminished by altering sleep/circadian timing.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsDelayed Sleep Phase
CountriesUnited States
CollaboratorsNational Institute on Drug Abuse (NIDA)

Timeline

N/ACompletedFinished
20192020202120222023202420252026
First PostedJan 16, 2019
Enrollment StartDec 3, 2018
Primary CompletionMar 22, 2024
Study CompletionNov 30, 2024
TodayJul 2, 2026
Enrollment to primary: 5.3 yearsPosted 7.5 years ago

Interventions

Increase morning bright lightother

Participants will wear Re-Timer bright glasses for 30 minutes each morning

Decrease evening blue lightother

Participants will wear tinted glasses that block blue wavelength light for 2 hours before bed

Sleep schedulingbehavioral

Participants will advance their weekday bedtime and maintain their weekday risetime on weekends

Monitor sleep, mood, and substance usebehavioral

Participants will monitor sleep, mood, and substance use via smartphone-based platform and wrist actigraphy