healthy person
Conditions
Interventions
Group A: For each participant, the study period spans 14 days, from Sunday through the following Saturday. During the first week, participants will wear tinted sunglasses from Tuesday through Saturday
Sponsors
S'UIMIN Inc.
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Participants must meet all of the following criteria: 1.Drivers who regularly work a five-days-on, two-days-off schedule and engage in night-shift driving work for five consecutive nights from Monday night to Friday night. 2.Individuals who can report their usual bedtime and wake-up time for each day from Sunday to Saturday, and whose calculated time in bed is not less than 5 hours. 3.Individuals who can comply with mild sleep control from the Sunday before sleep measurement until the end of sleep measurement, namely going to bed within +/-2 hours of their reported bedtime and waking up within +/-2 hours of their reported wake-up time. 4.Individuals who can avoid alcohol consumption and intake of caffeinated beverages after 4 hours before bedtime on electroencephalography measurement days. 5.Individuals who can sleep alone in a futon or bed during the study period. Sleeping in the same room with others is acceptable if each person uses independent bedding. 6.Individuals who understand the study contents and provide written informed consent voluntarily.
Exclusion criteria
Exclusion criteria: Individuals who meet any of the following criteria will be excluded: 1.Individuals currently visiting a medical institution for treatment or with a current medical history. 2.Individuals who regularly use medications, excluding vitamins. 3.Individuals who cannot discontinue supplements, foods with functional claims, health foods, or similar products related to sleep during the study period. 4.Individuals who habitually consume excessive alcohol. Excessive alcohol consumption is defined as drinking the equivalent of two go of sake or more, five times per week. 5.Individuals who are currently participating in, or planning to participate in, another clinical trial at the start of this study. 6.Individuals judged by the principal investigator to be inappropriate as study participants.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| For each participant, we will calculate the average values of sleep parameters (total sleep time, sleep efficiency, sleep latency, time spent awake during the night, total duration and percentage of deep sleep, etc.) on the measurement day under each condition. Using these metrics, we will conduct an exploratory analysis to determine whether daytime sleep after returning home improves when wearing tinted sunglasses while driving after sunrise, compared to when wearing blue light-blocking glasses. | — |
Secondary
| Measure | Time frame |
|---|---|
| For each participant, we will calculate the mean value of the subjective sleep assessment index obtained from the OSA-MA (Overnight Sleep Assessment-Morning) questionnaire administered upon waking on the measurement day under each condition. Using these indices, we will conduct an exploratory analysis to determine whether wearing tinted sunglasses while driving after sunrise improves subjective sleep quality during daytime sleep after returning home, compared to wearing blue light-blocking glasses. | — |
Countries
Japan
Contacts
Public ContactShuji Nakamura
S'UIMIN Inc. Business Division
Outcome results
None listed