An Investigation into the Variability of Sleep-Wake Pattern Disruptions in Circadian Rhythm Sleep-Wake Disorders

An Investigation into the Variability of Sleep-Wake Pattern Disruptions in Circadian Rhythm Sleep-Wake Disorders - An Investigation into the Variability of Sleep-Wake Pattern Disruptions in Circadian Rhythm Sleep-Wake Disorders

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000060029

Enrollment

100

Registered

2025-12-09

Start date

2025-12-09

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Circadian Rhythm Sleep-Wake Disorders

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: The study will include patients attending the Sleep Clinic of the Department of Psychiatry at Fujita Health University who have CRSWDs or psychiatric disorders presenting with disturbed sleep-wake rhythms, and who have shown either fluctuations in sleep duration during the course of illness or circadian sleep-wake cycles longer than 24 hours. For the prospective study, participants must provide written informed consent after receiving a full explanation and demonstrating sufficient understanding. At the time of consent, patients must be aged 12 years or older (at least elementary school graduate) and younger than 70 years, and participation must be entirely voluntary.

Exclusion criteria

Exclusion criteria: 1. Patients presenting with severe suicidal ideation 2. Patients deemed inappropriate by the principal investigator or co-investigators for any other reason

Design outcomes

Primary

Measure	Time frame
Melatonin and Cortisol Levels at Baseline and 2-4 Weeks Later, and Core Body Temperature	—

Secondary

Measure	Time frame
MEQ (Morningness-Eveningness Questionnaire) MCTQ (Munich ChronoType Questionnaire) Severity Level Criteria for Delayed Sleep Phase Syndrome BDI (Beck Depression Inventory) ESS (Epworth Sleepiness Scale) HAM-D (Hamilton Depression Rating Scale) Symptom Scale for Circadian Rhythm Sleep-Wake Disorders Sleep Diary and Actigraphy	—

Countries

Japan

Contacts

Public ContactReiko Kumagai

Fujita Health University Department of Psychiatry, School of Medicine

kumaniax@gmail.com0562-93-2000

Outcome results