Decreasing social jetlag with blue light blocking (reducing) glasses
- Conditions
- chronic sleep deprivation/social jetlagdaytime deprivation
- Registration Number
- NL-OMON40410
- Lead Sponsor
- Rijksuniversiteit Groningen
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- Not specified
- Target Recruitment
- 162
Healthy men and women between 18 and 45 years of age
Social jetlag = difference between mid-sleep on workdays and days off of minimum 2 hours
Written informed consent*
Sleep disorders, e.g. sleep apnoea, narcolepsy, restless legs, primary insomnia (will be asked in the General Questionnaire, appendix F1a) Mood disorder; because of the possibility of depressive mood as co morbidity in late chronotypes we will set the criterion for exclusion based on depressive mood on a BDI-II (appendix F1h) rating equal to or higher than 16 (indicating severe dysphoric or depressed mood) Two or more time zones crossed 1 month before study participation Shift-work during 5 years prior to participation Recent eye surgery (last year), glaucoma or other eye disease History of chronic diseases, and/or use of chronic medication for 3 months or longer before study participation Alcohol or drug problems (based on answers to the General Questionnaire, appendix F1a) The use of sleep and photosensitizing medication
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method <p>Sleep timing and sleep quantity from sleep diaries (subjective) and actimetry<br /><br>(objective)</p><br>
- Secondary Outcome Measures
Name Time Method <p>Sleep quality from subjective sleep diaries, rest-activity profiles from<br /><br>objective actimetry, light exposure from sleep diaries (subjective) and from<br /><br>actimetry (objective). In addition, secondary parameter in this study is the<br /><br>rhythm of melatonin concentration in saliva. The start of the rhythm will be<br /><br>measured: dim light melatonin onset (DLMO). A shift in DLMO is interpreted as a<br /><br>shift in the endogenous circadian pacemaker.</p><br>