Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Penn researchers find many commercial drivers have impaired performance due to lack of sleep

17.08.2006
Researchers suggest specific steps for the trucking industry to take to improve safety for everyone on our roads
Truck drivers who routinely get too little sleep or suffer from sleep apnea show signs of fatigue and impaired performance that can make them a hazard on the road, according to a major new study by researchers at the University of Pennsylvania School of Medicine. The study results are published in the August 15th issue of the American Journal of Respiratory and Critical Care Medicine.

This study is among the largest and most comprehensive studies of truck drivers and fatigue ever done. Penn researchers examined 406 truck drivers and found that those who routinely slept less than five hours a night were likely to fare poorly on tests designed to measure sleepiness, attention and reaction time, and steering ability. Drivers with severe sleep apnea, a medical condition that causes a poor quality of sleep, also were sleepy and had performance impairment.

Allan Pack, MB, ChB, PhD, who headed the study, said the tired truck drivers had impaired performance similar to that of drivers who are legally drunk. "We identified some very impaired people," said Pack, a sleep expert who directs Penn's Center for Sleep and Respiratory Neurobiology.

Nearly five percent of the truckers had severe sleep apnea (a condition in which someone stops breathing often during sleep), and about 13 percent of the drivers got fewer than five hours of sleep a night on a regular basis. "There are daytime neurobehavioral performance impairments that are found commonly in commercial drivers, and these are more likely among those who get an average of five or less hours of sleep a night and those who suffer from severe obstructive sleep apnea," the researchers concluded.

To measure the impact of fatigue on driver performance and safety, Penn researchers sent questionnaires to 4,826 truck drivers who had commercial licenses and lived within 50 miles of the Penn sleep centers. After getting complete responses from 1,329 drivers, they focused on 247 drivers at high risk for sleep apnea and 159 drivers at low risk.

The truck drivers, almost all men and on average 45 years old, were given wrist motion detection devices to measure how much they slept during a week. They then were put through a battery of tests at the sleep center. The drivers were monitored in the sleep lab while they slept to see if they had sleep apnea. About 28 percent of the drivers were found to have some degree of sleep apnea, with nearly five percent of them having a severe case.

Three tests were then given to measure daytime sleepiness and performance. The drivers were put in a dark room and observed to see how long it took them to doze off. Drivers who logged less than five hours of sleep dozed-off more quickly than those who got seven to eight hours of sleep. Drivers with severe sleep apnea also dozed-off more rapidly. A lab test to analyze attention and reaction time and another to gauge "lane tracking ability" also turned up performance impairment among the sleep-deprived.

When the results were compiled, investigators discovered:

  • Just over five percent of drivers showed impairment on all three performance-related tests.
  • Nearly 60 percent did not fare well by at least one measure.
  • About half of the drivers who got less than five hours of sleep had two or three impairments. That's compared to 10 percent of driver who got more than eight hours of sleep regularly.
  • Likewise, about 60 percent of the drivers with severe sleep apnea had two or three impairments.

According to the journal article, about 5,600 people are killed each year in the U.S. in crashes involving commercial trucks. Many of the crashes happen when the driver falls asleep at the wheel. Penn researchers are now suggesting specific steps for the Federal Motor Carrier Safety Administration to take to improve safety for everyone on our roads:

  • Develop strategies to identify impaired drivers through objective testing.
  • Implement programs to identify and test drivers with severe sleep apnea and monitor that they stick to their treatment.
  • And introduce programs to assess and promote longer durations of sleep among commercial drivers.

The results of this study are published in the August 15th issue of the American Journal of Respiratory and Critical Care Medicine. You can access the journal on-line at: . The article is titled, "Impaired Performance in Commercial Drivers: Role of Sleep Apnea and Short Sleep Duration." Other Penn researchers who worked on the study were: Greg Maislin; Bethany Staley; Frances Pack and David Dinges. William Rogers, formerly of the Trucking Research Institute, American Trucking Associations as well as Charles F. P. George of the University of Western Ontario were also involved.

Susanne Hartman | EurekAlert!
Further information:
http://www.uphs.upenn.edu

More articles from Studies and Analyses:

nachricht Do microplastics harbour additional risks by colonization with harmful bacteria?
05.04.2018 | Leibniz-Institut für Ostseeforschung Warnemünde

nachricht Rutgers-led innovation could spur faster, cheaper, nano-based manufacturing
14.02.2018 | Rutgers University

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Spider silk key to new bone-fixing composite

University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.

Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

Im Focus: Basel researchers succeed in cultivating cartilage from stem cells

Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.

Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...

Im Focus: Like a wedge in a hinge

Researchers lay groundwork to tailor drugs for new targets in cancer therapy

In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Magnetic nano-imaging on a table top

20.04.2018 | Physics and Astronomy

Start of work for the world's largest electric truck

20.04.2018 | Interdisciplinary Research

Atoms may hum a tune from grand cosmic symphony

20.04.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>