Relationship between nighttime light brightness and individual sleep and rhythm characteristics, obesity, and mental health

JRCT ID: jRCT1030230179

Registered date:25/06/2023

Basic Information

• Recruitment status: Not Recruiting
• Health condition(s) or Problem(s) studied: Healthy subjects
• Date of first enrollment: 25/06/2023
• Target sample size: 2358
• Study type: Observational

Outcome(s)

• Primary Outcome: Association of nighttime light brightness with chronotype, obesity, and mental health by region

Secondary Outcome

Comparison of night light brightness, chronotype, obesity, and mental health between urban and suburban areas
Regional, age, and gender differences in the amount of effect of night light on chronotype, obesity, and mental health

Key inclusion & exclusion criteria

• Age minimum: >= 20age old
• Age maximum: <= 79age old
• Gender: Both

Include criteria

1) Persons who are between 20 and 79 years of age at the time of response.
2) Able to answer the questionnaire via the Internet.

Exclude criteria

1) Patients 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) 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 who is deemed inappropriate by the principal investigator.

Related Information

• Primary Sponsor: Kitamura Shingo
• Source(s) of Monetary Support: Japan Society for the Promotion of Science