Validation of the reduced morningness-eveningness questionnaire (rMEQ: reduced morningness-eveningness questionnaire) in Japanese

Phase 1

Recruiting

• Conditions: Circadian rhythm disorders; insomnia; D021081

• Registration Number: JPRN-jRCT1030230180
• Lead Sponsor: Kitamura Shingo

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2023-06-25
• Last Update Posted: 17 October 2023

Recruitment & Eligibility

• Status: Recruiting
• Sex: All
• Target Recruitment: 2243

Inclusion Criteria

Study 1:
1) Persons who are between 20 and 79 years old at the time of response.
2) Who are able to respond to the questionnaire via the Internet.
Study 2
1) Males between 20 and 35 years of age at the time of consent

Exclusion Criteria

Study 1:.
1) Persons with pre-existing medical conditions (cardiovascular, liver, endocrine system, brain/neurological, psychiatric, etc.), taking therapeutic drugs, or having a history of such conditions that may affect the study results
2) Persons who are dependent on alcohol or who are found to be in the habit of excessive alcohol consumption
3) Those who have a habit of taking drugs or supplements that affect sleep.
4) Pregnant, lactating, or planning to become pregnant during the study period
5) Who are using an implantable medical device such as a pacemaker
6) Any other person deemed inappropriate by the principal investigator.
Study 2: The following are not included in the study
1) Persons with pre-existing medical conditions (cardiovascular, liver, endocrine, brain/neurological, psychiatric, etc.), taking therapeutic drugs, or having a history of such conditions that may affect the results of the study
2) Those who have engaged in time-lagged travel or shift work at least 6 months prior to the experiment.
3) Persons who have been found to be dependent on alcohol or to have excessive drinking habits
4) Persons with excessive smoking habits
5) Those who have a habit of taking drugs or supplements that affect sleep
6) Those with abnormal color vision
7) Those who have a phobia of dark places
8) Other subjects deemed inappropriate by the principal investigator

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Association between chronotypes determined by MEQ and rMEQ, respectively<br>Association between DLMO and sleep rhythm phase and chronotypes determined by rMEQ

Secondary Outcome Measures

Name	Time	Method
Questionnaires with significant contribution to chronotype determination<br>Association of chronotype with sleep irregularities