Too Much, Too Little Sleep Increases Ischemic Risk In Postmenopausal Women

According to the researchers, postmenopausal women who regularly sleep more than nine hours a night may have an increased risk of ischemic stroke.

Compared to women sleeping seven hours, the risk of ischemic stroke was 60-70 percent higher for those sleeping nine hours or more, said lead author Jiu-Chiuan Chen, M.D., Sc.D., assistant professor of epidemiology at the University of North Carolina’s School of Public Health in Chapel Hill.

“After accounting for all common clinical conditions predictive of stroke, we found this increase was statistically significant: sleeping nine hours or more is strongly associated with increased risk of ischemic stroke,” he said.

Researchers also found that women who slept six hours or less [Less sleep] were at 14 percent greater stroke risk than those who slept seven hours a night.

Nearly twice as many women reported sleeping less than six hours (8.3 percent) than those who reported sleeping nine hours or more (4.6 percent).

“The prevalence in women of having long sleep duration is much lower than having sleep duration less than six hours. So the overall public health impact of short sleep is probably larger than long sleep,” Chen said.

“This study provides additional evidence that habitual sleep patterns in postmenopausal women could be important for determining the risk of ischemic stroke.”

More information at EurekAlert