Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sleep apnea, depression linked in Stanford study

07.11.2003


People with depression are five times more likely to have a breathing-related sleep disorder than non-depressed people, according to a study at the Stanford University School of Medicine. The study is the first to show a link between depression and sleep apnea along with its related disorders.

Although it remains unclear how the conditions are linked, Maurice Ohayon, MD, PhD, said his study should encourage physicians to test depressed patients for this type of sleep disorder.

"Physicians who see people with depression shouldn’t stop at the first diagnosis, but instead look into the presence of a breathing-related sleep disorder," said Ohayon, an associate professor of psychiatry and behavioral sciences. His study appears in the current issue of the Journal of Clinical Psychiatry.



These disorders include such breathing anomalies as chronic, disruptive snoring and obstructive sleep apnea syndrome, a disorder in which people stop breathing for brief periods up to hundreds of times a night. Left untreated, the disorders can lead to hypertension, stroke and cognitive deterioration. They can also affect a person’s daily routine and disrupt his or her familial, social and professional life.

"This type of disorder increases a person’s chances of feeling sleepy and irritable, having a dispute with a family member or colleague, or getting into a traffic accident," said Ohayon.

Several studies have suggested that sleep apnea is associated with a higher rate of depressive disorder and that treating sleep apnea could help control depression in patients. But no previous study had explored this association and its risk factors in the general population.

To assess the impact of the two disorders in the general population, Ohayon conducted a telephone survey with adults in five countries (the United Kingdom, Germany, Italy, Portugal and Spain). More than 18,000 people were chosen as a representative sample of 206 million Europeans. The participants answered questions pertaining to sleep quality and schedules, breathing-related sleep disorders, mental disorders and medical conditions.

After analyzing the data, Ohayon found that 2.1 percent of the people surveyed had sleep apnea - a figure consistent with data from past studies on selected populations - and 2.5 percent had another type of breathing-related sleep disorder. Eighteen percent of respondents who were experiencing a depressive disorder (4 percent of all respondents) also had a breathing-related sleep disorder, compared with 3.8 percent of non-depressed respondents. That represents a five-times increased likelihood of breathing-related sleep disorders among depressed people.

"This is the first study to show the strength of the link between the two disorders," said Ohayon, adding that even after controlling for obesity and hypertension (important factors in each disorder) the association remained strong.

It remains unclear whether depression occurred before or after sleep apnea, and to what extent sleep apnea contributes to the maintenance or aggravation of depression. Ohayon said the link between treating sleep apnea syndrome and the evolution of depressive disorders needs further investigation. He hopes physicians will consider the association between the disorders and depression when treating depressed patients. "Once people have their sleep apnea recognized, there is a lot we can do to help them," he said.

Ohayon received funding for his research from the Medical Research Council of Quebec and an unrestricted educational grant from the Sanofi-Synthelabo Group, a pharmaceutical company.

Michelle Brandt | EurekAlert!
Further information:
http://mednews.stanford.edu

More articles from Health and Medicine:

nachricht How cancer metastasis happens: Researchers reveal a key mechanism
19.01.2018 | Weill Cornell Medicine

nachricht Researchers identify new way to unmask melanoma cells to the immune system
17.01.2018 | Duke University Medical Center

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>