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Insomnia
may significantly increase stroke risk
Insomnia
may significantly increase stroke risk
Date:
April 3,
2014
Source:
American Heart Association
Summary:
Insomnia may significantly increase your risk of
stroke and subsequent stroke hospitalizations. The risk was highest -- up to
eight times -- among insomniacs 18-34 years old in a recent study. The risk
also seems to be far greater when insomnia occurs as a young adult compared to
those who are older, said researchers.
.................................
The risk of
stroke may be much higher in people with insomnia compared to those who don't
have trouble sleeping, according to new research in the American Heart
Association journal Stroke.
The risk
also seems to be far greater when insomnia occurs as a young adult compared to
those who are older, said researchers who reviewed the randomly-selected health
records of more than 21,000 people with insomnia and 64,000 non-insomniacs in
Taiwan.
They found:
- Insomnia raised the likelihood of subsequent hospitalization for stroke by 54 percent over four years.
- The incidence of stroke¬ was eight times higher among those diagnosed with insomnia between 18-34 years old. Beyond age 35, the risk continually decreased.
- Diabetes also appeared to increase the risk of stroke in insomniacs.
"We
feel strongly that individuals with chronic insomnia, particularly younger
persons, see their physician to have stroke risk factors assessed and, when
indicated, treated appropriately," said Ya-Wen Hsu, Ph.D., study author
and an assistant professor at Chia Nan University of Pharmacy and Science and
the Department of Medical Research at Chi-Mei Medical Center in Taiwan.
"Our findings also highlight the clinical importance of screening for
insomnia at younger ages. Treating insomnia is also very important, whether by
medication or cognitive therapy."
The study is
the first to try to quantify the risk in a large population group and the first
to assess if the risk of stroke differs by insomnia subtypes, Hsu said.
Researchers
divided participants -- none of whom had a previous diagnosis of stroke or
sleep apnea -- into different types of insomnia. In general, insomnia included
difficulty initiating or maintaining sleep; chronic or persistent insomnia
lasted one to six months; relapse insomnia was a return of insomnia after being
diagnosed free of disease for more than six months at any assessment point
during the four-year study; and remission was a change from a diagnosis of
insomnia to non-insomnia at the subsequent time point.
During the
four-year follow-up, 583 insomniacs and 962 non-insomniacs were admitted for
stroke. Persistent insomniacs had a higher three-year cumulative incidence of
stroke compared to the other participants in the remission group.
The
mechanism linking insomnia to stroke is not fully understood, but evidence
shows that insomnia may alter cardiovascular health via systematic
inflammation, impaired glucose tolerance, increased blood pressure or
sympathetic hyperactivity. Some behavioral factors (e.g., physical activity,
diet, alcohol use and smoking) and psychological factors like stress might
affect the observed relationship.
The
researchers said it's unclear if the findings also apply to people in other
nations, but studies in other countries have also pointed to a relationship
between insomnia and stroke.
"Individuals
should not simply accept insomnia as a benign, although difficult, condition
that carries no major health risks," Hsu said. "They should seek
medical evaluation of other possible risk factors that might contribute to
stroke."
Story
Source:
The above story
is based on materials provided by American Heart Association. Note: Materials may
be edited for content and length.
Journal
Reference:
- Ming-Ping Wu, Huey-Juan Lin, Shih-Feng Weng, Chung-Han Ho, Jhi-Joung Wang, and Ya-Wen Hsu. Insomnia Subtypes and the Subsequent Risks of Stroke: Report From a Nationally Representative Cohort. Stroke, April 2014 DOI: 10.1161/STROKEAHA.113.003675
Cite This
Page:
American Heart Association.
"Insomnia may significantly increase stroke risk." ScienceDaily.
ScienceDaily, 3 April 2014.
<www.sciencedaily.com/releases/2014/04/140403212521.htm>.