Circadian rhythm sleep disorder
Conditions
Interventions
Group A participants will work for 40 days in an environment using cool white LEDs, followed by 40 days in an environment using warm white LEDs (from 9 PM to 6 AM the next day). After this, they will
Sponsors
Japan Community Healthcare Organization Uwajima Hospital
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Nurses working in the research facility who meet all of the following criteria. 1) Place of work: ward A or ward B of the research facility. 2) Healthy at the time of study participation and not having taken any medication continuously in the last three months. 3) Age: between 20 and 70 years of age at the time consent is obtained. 4) Gender: any gender 5) Written consent to participate in research: the research participants freely and voluntarily consented to the document.
Exclusion criteria
Exclusion criteria: 1) If the research participant's free and voluntary written consent cannot be obtained 2) People who have been using drugs regularly in the last 3 months. 3) People who have gained or lost weight rapidly.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Melatonin concentration | — |
Secondary
| Measure | Time frame |
|---|---|
| a. cortisol concentration in hair b. Melatonin concentration in blood c. Melatonin concentration in saliva d. Diurnal rhythm of deep body temperature e. Sleep diary f. Questionnaire survey of mental and sleep indicators g. Number of overtime hours worked h. Assessment by activity meters. | — |
Countries
Japan
Contacts
Public ContactFumihisa Miyauchi
Japan Community Healthcare Organization Uwajima Hospital internal medicine
Outcome results
None listed