Light at Night Study

NCT ID: NCT04251234

Last Updated: 2021-08-12

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

NA

Total Enrollment

2 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-10-15

Study Completion Date

2021-08-04

Brief Summary

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The purpose of this mechanistic study is to examine light sensitivity (melatonin suppression) in people with bipolar depression I, and compare it to healthy controls. This is not a treatment study.

Detailed Description

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The bipolar disorder I and healthy control arms are recruited from the existing Heinz C. Prechter Bipolar Research Program at the University of Michigan.

Conditions

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Bipolar Disorder Light Sensitivity

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

OTHER

Blinding Strategy

NONE

There is no masking. The dim light (\<1 lux) condition is first, followed by the room light (\~30 lux) condition. Participants are aware of this condition order.

Study Groups

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Healthy controls

* No co-morbid medical or psychiatry diagnoses
* No family history of mental illness
* No current medication use
* Non-smoking

Group Type EXPERIMENTAL

Light intensity, ~30 lux

Intervention Type OTHER

\~30 lux compared to very dim light baseline condition \<1 lux

Baseline light intensity, <1 lux

Intervention Type OTHER

Very dim light condition

Bipolar I disorder

* Clinical diagnosis of Bipolar I disorder
* Can be (not required, not exclusionary) taking lithium and/or sodium valproate and/or antidepressants
* Can be (not required, not exclusionary) light smokers

Group Type EXPERIMENTAL

Light intensity, ~30 lux

Intervention Type OTHER

\~30 lux compared to very dim light baseline condition \<1 lux

Baseline light intensity, <1 lux

Intervention Type OTHER

Very dim light condition

Interventions

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Light intensity, ~30 lux

\~30 lux compared to very dim light baseline condition \<1 lux

Intervention Type OTHER

Baseline light intensity, <1 lux

Very dim light condition

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* BMI 18-30 kg/m2
* Appropriate sleep schedules according to study staff. Sleep schedule is self-reported and confirmed through a sleep diary
* Healthy eyes as ascertained by eye exam at University of Michigan Kellogg Eye Center
* Willing and able to maintain stable sleep schedule during study.
* Participants will be breathalyzed and undergo urine drugs screens at every lab visit
* Acknowledge and understand that participants cannot drive themselves home after certain lab visits. Note that the research team will provide a travel stipend of $10 per visit to offset potential rideshare/taxi costs

Exclusion Criteria

* Color blindness
Minimum Eligible Age

18 Years

Maximum Eligible Age

45 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Michigan

OTHER

Sponsor Role lead

Responsible Party

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Helen Burgess

Professor of Psychiatry

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Helen Burgess, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Michigan

Locations

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University of Michigan

Ann Arbor, Michigan, United States

Site Status

Countries

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United States

Other Identifiers

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HUM00173528

Identifier Type: -

Identifier Source: org_study_id

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