Light Treatment to Shift-working Nurses

NCT ID: NCT02978053

Last Updated: 2019-10-02

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 35 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-11-30
• Study Completion Date: 2019-06-30

Brief Summary

This project examines 1) the effects of appropriately timed bright light on adaptation (in terms of sleep and sleepiness) to three consecutive night shifts; and 2) the effects of such bright light on re-adaptation (in terms of sleep and sleepiness) to a day-oriented schedule after the night shift period.

Detailed Description

Shift workers frequently experience sleepiness during night shifts, which may have consequences for performance. Sleep duration is often shortened after a night shift. Properly timed bright light treatment is efficient in delaying the circadian rhythm and can enhance alertness, increase performance and prolong sleep after night shifts. There is a lack of studies on light treatment to rotating shift workers. This study is a randomized controlled crossover trial evaluating the effect of bright light treatment on sleep and sleepiness in rotating shift workers with three consecutive night shifts. The aim is to evaluate whether bright light treatment improves adaptation to three consecutive night shifts (reduces sleepiness during night shifts and improves sleep after night shifts), as well as whether such treatment affects re-adaptation to a day-oriented schedule after the night shift period.

Conditions

Shift-Work Sleep Disorder

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: TRIPLE

Study Groups

Bright light

10 000 lux

Group Type: EXPERIMENTAL

Bright light

Intervention Type: BEHAVIORAL

Bright light for 30 minutes during night shifts (between 2 AM and 3 AM the first night, between 3 AM and 4 AM the second night, between 4 AM and 5 AM the third night).

Red light

400 lux

Group Type: PLACEBO_COMPARATOR

Red light

Intervention Type: BEHAVIORAL

Red light for 30 minutes during night shifts (between 2 AM and 3 AM the first night, between 3 AM and 4 AM the second night, between 4 AM and 5 AM the third night).

Interventions

Bright light

Bright light for 30 minutes during night shifts (between 2 AM and 3 AM the first night, between 3 AM and 4 AM the second night, between 4 AM and 5 AM the third night).

Intervention Type: BEHAVIORAL

Red light

Red light for 30 minutes during night shifts (between 2 AM and 3 AM the first night, between 3 AM and 4 AM the second night, between 4 AM and 5 AM the third night).

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• A rotating shift work schedule involving three days without night shifts, followed by three consecutive night shifts, followed by three days without night shifts
• Problems with sleepiness during night shifts

Exclusion Criteria

• Pregnancy

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Bergen

OTHER

Sponsor Role: lead

Responsible Party

Bjorn Bjorvatn

Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Bjørn Bjorvatn, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Bergen

Locations

University of Bergen

Bergen, Hordaland, Norway

Countries

Norway

Other Identifiers

UiB112016

Identifier Type: -

Identifier Source: org_study_id