CI

At a glance

ClinicalIndex Comparison Record
N/ACompleted· 14 enrolled
Drug / intervention
Sleep Restriction with ALAN first, then Sleep Restriction without ALAN +1 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/NCT04868539
NCT04868539N/ACompleted
CompareCT.gov

Influence of Nocturnal Light Exposure on the Impairment of Glucose Tolerance Induced by Chronic Sleep Restriction

Brigham and Women's Hospital·interventional·Posted May 3, 2021·Updated Oct 14, 2025

In Brief

A clinical study evaluating Sleep Restriction with ALAN first, then Sleep Restriction without ALAN and Sleep Restriction without ALAN first, then sleep restriction with ALAN for Glucose Intolerance and 2 related conditions. Completed, enrolled 14 participants across 1 site.

Detailed Summary

This project is designed to test for the first time whether glucose metabolism is differentially impaired by sleep restriction with and without additional exposure to artificial light at night (ALAN).

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsGlucose Intolerance, Sleep Deprivation, Sleep
CountriesUnited States
Collaborators--

Timeline

N/ACompletedFinished
20222023202420252026
First PostedMay 3, 2021
Enrollment StartMar 15, 2022
Primary CompletionFeb 20, 2024
Study CompletionMay 30, 2024
TodayJul 2, 2026
Enrollment to primary: 1.9 yearsPosted 5.2 years ago

Interventions

Sleep Restriction with ALAN first, then Sleep Restriction without ALANother

Sleep restriction with 90 lux lighting for 19hr/day first, followed by Sleep restriction with 90 lux lighting for 14hr/day

Sleep Restriction without ALAN first, then sleep restriction with ALANother

Sleep restriction with 90 lux lighting for 14hr/day first, followed by Sleep restriction with 90 lux lighting for 19hr/day