Daytime dozing may increase stroke risk in elderlyFebruary 22nd, 2008 - 12:47 pm ICT by admin
Washington, Feb 22 (ANI): A new study has suggested that regular daytime dozing is linked to a significantly increased risk of stroke in older people.
The study, reported at the American Stroke Associations International Stroke Conference 2008, showed that stroke risk was two- to four-fold greater in those with moderate dozing.
Bernadette Boden-Albala, Ph.D., an assistant professor of neurology at Columbia Universitys College of Physicians and Surgeons in New York City, lead author of the study, said the findings suggest that daytime dozing may be an important and novel stroke risk factor.
In this study, dozing means a person unintentionally falling asleep.
The researchers found that among 2,153 participants in a prospective study with an average follow-up of 2.3 years, the risk of stroke was 2.6 times greater for those classified as doing some dozing compared to those with no dozing. Those in the significant dozing group had a 4.5 times higher risk.
Those are significant numbers. We were surprised that the impact was that high for such a short period of time, Boden-Albala said.
Previous research has shown that people who suffer from sleep apnoea - short periods when breathing stops during sleep - have an increased stroke risk.
It could be that daytime sleepiness is a sign of sleeping poorly at night because of sleep apnoea.
For the study, Boden-Albala and colleagues studied a community-based cohort as part of the long-term Northern Manhattan Study (NOMAS), which began in 1990 and included men and women ages 40 and older.
This was the first effort investigating stroke risk factors in whites, blacks and Hispanics living in the same community.
No study participants had suffered a stroke. At the beginning of the study, their average age was 73 years and 64 percent were women. The racial-ethnic mix was 60 percent Hispanic, 20 percent black and 18 percent white.
In 2004, the researchers began collecting daytime dozing data annually using the Epworth Sleepiness Scale, which asks people to rate their frequency of dozing off during specific situations, such as watching TV, sitting and talking to someone, sitting quietly after a lunch without alcohol and stopping briefly in traffic while driving.
Based on the scale findings, the researchers designated participants as no dozing (44 percent), some dozing (47 percent) and significant dozing (9 percent).
In the two years of follow-up, Boden-Albala and colleagues sought to determine the number of strokes and vascular events, which they defined as a heart attack or stroke death caused by vascular problems, among the dozing study members. They detected 40 strokes and 127 vascular events.
After taking into account several stroke risk factors such as age, race-ethnicity, sex, education, blood pressure, diabetes, obesity and physical activity, the researchers found high stroke risks for the some dozing and significant dozing groups as compared to no dozing.
They found that the risk of a heart attack or vascular death was higher, 1.6 percent for the moderate dozers and 2.6 percent for the significant dozers.
The results were similar for all ethnicities and both genders.
These findings, if confirmed by other studies, carry important public health implications as well.
Studies demonstrate that we are not getting enough sleep, so were tired. But the real question is, what are we doing to our bodies? Sleepiness obviously puts us at risk of stroke, Boden-Albala said. (ANI)
- Diet soda ups risk of vascular events; high salt intake linked to stroke - Feb 10, 2011
- For the aged, daytime doze not such a good idea - Feb 22, 2008
- Death risk high in older adults with sleep apnea and daytime sleepiness - Apr 02, 2011
- Sleepy child? Factor in obesity, asthma - May 17, 2011
- Are diet soft drinks invitation to heart attacks? - Feb 01, 2012
- Long term diabetics exposed to triple stroke-risk - Mar 02, 2012
- Women suffer high rates of sleep apnoea: Study - Aug 16, 2012
- Less sleep enhances stroke risk among middle-aged - Jun 11, 2012
- Insulin resistance may be linked to stroke risk - Oct 12, 2010
- Sleep disorder linked to elderly men's blood pressure - Aug 31, 2011
- Surgery for obstructive sleep apnea reduces drowsiness during daytime - Jan 28, 2011
- Drowsiness linked with learning problems at school - May 02, 2012
- Sleep problems may cause kids to become aggressive - Jun 01, 2011
- More sleep may trigger stroke risk in women - Nov 15, 2010
- Heavy snoring doubles arthritis risk - Jun 28, 2012
Tags: american stroke, cohort, college of physicians, college of physicians and surgeons, daytime sleepiness, ethnic mix, international stroke conference, nomas, northern manhattan, physicians and surgeons, previous research, prospective study, risk factor, short periods, significant numbers, sleep apnoea, stroke risk factors, study participants, universitys, women ages