Self-help Book for Shift Work Related Problems

Study Overview
=================
Brief Summary
-----------------
The aim is to assess whether a self-help book for coping with shift work will reduce complaints in relation to shift work.

Detailed Description
-----------------
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.

Official Title
-----------------
The Effect of a Self-help Book for Shift Work Related Problems - a Randomized Controlled Trial

Conditions
-----------------
Shift-work Disorder

Intervention / Treatment
-----------------
* Other: Book
* Other: Sleep hygiene


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Symptoms suggesting shift work disorder Health care worker Exclusion Criteria: Below 18 years

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Self-help book<br>A self-help book for coping with shift work | Other: Book<br>* Self-help book describing advice to cope with shift work<br>|
| Active Comparator: Sleep hygiene advice<br>A sheet of paper with basic and standard sleep hygiene advice | Other: Sleep hygiene<br>* Basic sleep hygiene advice on a piece of paper<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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. | 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. | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Shift work disorder | Prevalence of shift work disorder based on international criteria | 6 months | 
| Knowledge about shift work and health | Questions about sleep, circadian rhythms and shift work | 6 months | 
| Sick leave | Self-reported sickness absence | 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. | 6 months |