Self-help Book for Shift Work Related Problems

April 30, 2026 updated by: University of Bergen

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

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

Study Overview

Status

Completed

Conditions

Intervention / Treatment

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.

Study Type

Interventional

Enrollment (Actual)

199

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Norway
    • Hordaland
      • Bergen, Hordaland, Norway, 5018
        • University of Bergen

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Symptoms suggesting shift work disorder
  • Health care worker

Exclusion Criteria:

  • Below 18 years

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

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

What is the study measuring?

Primary Outcome Measures

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

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Bergen

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 18, 2022

Primary Completion (Actual)

January 1, 2025

Study Completion (Actual)

January 1, 2025

Study Registration Dates

First Submitted

November 21, 2022

First Submitted That Met QC Criteria

November 21, 2022

First Posted (Actual)

December 1, 2022

Study Record Updates

Last Update Posted (Actual)

May 1, 2026

Last Update Submitted That Met QC Criteria

April 30, 2026

Last Verified

December 1, 2024

More Information

Terms related to this study

Other Study ID Numbers

  • HEWOS_RCT_SWD2022

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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