Naps and Pulses of Bright Light in Shift Workers

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00487292
Recruitment Status : Completed
First Posted : June 18, 2007
Last Update Posted : June 19, 2007
University of Paris 5 - Rene Descartes
Information provided by:
Assistance Publique - Hôpitaux de Paris

Brief Summary:

Design: paired trials without and with naps and bright light. Setting: Real driving on a private road circuit. Environmental controlled car. Participants: 9 shift workers on tree shifts (morning-afternoon-night) Measurements: Sleepiness at the wheel was measured by ambulatory polysomnography and assessed using 30 seconds segments of recordings when the percentage of theta EEG was at least 50% (15 seconds) of the period recorded. Subjects were also called to rate their sleepiness on the 7-point Stanford Sleepiness Scale (SSS).

Intervention: Participants drove the same car on two similar 24 hours periods of work, with three pilots in each shift (morning, afternoon, night), separated by three weeks. During the baseline period, the subjects were told to manage their rest as they usually do in the real life. During the second experimental period, they had to rest lied in a dark room during two naps of 20 minutes and then exposed to bright light pulse (5000 lux) during 10 minutes.

Condition or disease Intervention/treatment Phase
Sleep Behavioral: naps and pulses of bright light Not Applicable

Detailed Description:
Results are submitted to publication

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 9 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double
Primary Purpose: Prevention
Official Title: The Effects of a Combination of Napping and Bright Light Pulses on Shift Workers Sleepiness at the Wheel A Pilot Study
Study Start Date : April 2003
Actual Study Completion Date : June 2006

Primary Outcome Measures :
  1. EEG sleepiness at the wheel [ Time Frame: two periods of 8 hours driving ]

Secondary Outcome Measures :
  1. subjective sleepiness at the stanford sleepinesss scale [ Time Frame: two periods of 8 hours driving ]

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • A professional experience of at least one year

Exclusion Criteria:

  • With an history of chronic disease,treatments (or toxic)
  • Subjects with a suspicion of sleep disorders
  • Snorers

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00487292

Centre du Sommeil Hôtel Dieu de Paris, 1 place Parvis Notre Dame
Paris, France, 75181 Paris CEDEx 04
Sponsors and Collaborators
Assistance Publique - Hôpitaux de Paris
University of Paris 5 - Rene Descartes
Principal Investigator: damien leger, M.D, Ph.D Centre du Sommeil Hotel Dieu
Study Director: pierre philip, M.D, Ph.D Hopital Pellegrin Bordeaux