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Depression Health Center

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Depression Raises Women's Stroke Risk

Study Finds Link Between Depression and Stroke, With Depression Boosting Risk 29%
WebMD Health News
Reviewed by Laura J. Martin, MD

Aug. 11, 2011 -- Depression moderately increases a woman's risk of stroke, according to a new study that confirms earlier research.

"Women who had a history of depression or who were currently depressed had about a 29% increased risk of stroke," says An Pan, PhD, research fellow at the Harvard School of Public Health. The increased risk remained even when risk factors such as cigarette smoking were taken into account.

Pan and his colleagues evaluated nearly 81,000 women, aged 54 to 79, who were enrolled in the Nurses' Health Study.

The research is in the journal Stroke.

About 795,000 Americans have a new or repeat stroke each year. Nearly 7% of U.S. adults experience depression in a given year. Women are 70% more likely than men to have depression at some point in their lives.

Depression and Stroke: Study Details

The researchers followed the women for six years. They evaluated symptoms of depression by using a standard mental health index at several time points.

They asked the women if they were on antidepressant medication or had been in the past. Every two years, they asked if they had been diagnosed with depression now or in the past.

At the start of the study, 22% of the women reported current or past depression.

During the follow-up, 1,033 strokes occurred. When the researchers looked more closely, they found:

  • Having a history of depression or current depression boosted risk by 29%. When they looked only at those in this group with current depression, risk increased by 41%.
  • Having only a history of depression increased risk by 23%. That was not a risk increased enough to be significant.
  • Current use of antidepressants boosted risk by 39% in women diagnosed with depression who were also found to be depressed on the mental health index.

However, Pan says the use of antidepressants is not thought to be linked with stroke risk. "The medication use could be a marker for depression severity." The most depressed were probably most likely to be on the medicine.

The study was funded by the National Heart, Lung, Blood Institute.

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