An interventional study of Book and Sleep hygiene in Shift-work Disorder, sponsored by University of Bergen. Completed at 1 site in Norway. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-05-01.
Sponsored by University of Bergen · Not applicable, Interventional, and Treatment
The aim is to assess whether a self-help book for coping with shift work will reduce complaints in relation to shift work.
This study is a randomized controlled trial evaluating the effect of a self-help book for shift work related problems compared to the effect of sleep hygiene advice in participants with shift work disorder. 300 participants will be randomized to receive either the book or the sleep hygiene advice. Participants complete questionnaires about sleep, sleepiness and health at baseline and after 6 months after receiving the written material. The main aims are to assess whether the book is more effective to reduce sleep and sleepiness problems in relation to shift work, and to reduce the prevalence of shift work disorder, to increase knowledge about sleep and circadian rhythms, improve health, and reduce turnover intention.
University of Bergen is the lead sponsor of 141 studies on the registry; 19 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
A self-help book for coping with shift work
Other: Book
A sheet of paper with basic and standard sleep hygiene advice
Other: Sleep hygiene
Self-help book describing advice to cope with shift work
Basic sleep hygiene advice on a piece of paper
Sleep problems
Self-reported sleep problems in relation to shift work on a validated scale - Bergen Shift Work Sleep Questionnaire (BSWSQ). Questions range from 0 to 4 with higher values indicating more sleep problems.
Time frame: 6 months
Sleepiness problems
Self-reported sleepiness in relation to shift work on a validated scale - Bergen Shift Work Sleep Questionnaire (BSWSQ). Questions range from 0 to 4 with higher values indicating more sleepiness.
Time frame: 6 months
Shift work disorder
Prevalence of shift work disorder based on international criteria
Time frame: 6 months
Knowledge about shift work and health
Questions about sleep, circadian rhythms and shift work
Time frame: 6 months
Sick leave
Self-reported sickness absence
Time frame: 6 months
Turnover intention
Self-reported turnover intention on a validated scale (TI) with scores ranging from 0 to 4 with higher values indicating more turnover intention.
Time frame: 6 months
Plan to share: No
No publications or documents are linked to this record.
This study is completed, as verified in Dec 2024. You cannot join it, but the record below documents what was studied.
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University of Bergen