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Can a Woman's Job Raise Her Heart Attack Risk?

High-Stress Jobs May Boost Women's Heart Attack Risk
By
WebMD Health News
Reviewed by Louise Chang, MD

stressed working woman

July 18, 2012 -- Women with high-stress jobs are at higher risk of heart attacks and other heart problems compared to those with lower-stress jobs, according to a new study.

"Women who had high-strain jobs had a 40% higher likelihood of having a cardiovascular event compared to women who were in the low-strain category," says researcher Michelle A. Albert, MD, MPH, a cardiologist at Brigham and Women's Hospital and an associate professor of medicine at Harvard Medical School.

"High strain is defined as high demand and low control," she says. A factory job in which a worker is pressured to produce is an example.

Then came the surprise finding. Women in what she calls ''active strain'' jobs -- highly demanding, but with high control -- had the same increased risk as those in the high stress, low-control positions.

Job insecurity was not linked with a risk of heart attack, stroke, and other cardiovascular problems, Albert also found.

The study is published in PLoS ONE.

High-Stress Jobs & Women

The researchers followed more than 22,000 participants in the long-running Women's Health Study. The women's average age was 57.

The women were categorized into four job-strain groups. Job strain takes into account both the demands and the control a worker has. The groups are:

  • Low strain: with low demand, high control
  • Passive: with low demand, low control
  • Active: with high demand, high control
  • High strain: with high demand, low control

The researchers followed the women for 10 years, looking to see who had one of four types of events. They found:

  • 170 heart attacks
  • 163 strokes
  • 440 heart procedures such as stents, bypass surgery, or angioplasty
  • 52 deaths from cardiovascular disease

The researchers took into account other factors that could affect heart health, such as age, race, education, and income.

Even then, they found the nearly 40% increased risk of any of the four outcomes in the women in the active or high-strain groups.

When they looked just at nonfatal heart attacks, they found women in the high-strain group were 67% more likely than those in the low-strain jobs to have one.

They looked, too, at depression and anxiety. Those factors explained only about 20% of the relationship, Albert tells WebMD. More study is needed to further explain the link, she says.

Job insecurity did not appear to increase the risk of heart attack or stroke, she says.

High-Stress Jobs & Women: Perspective

The new findings differ from some previous research, says Mika Kivimaki, PhD, professor of social epidemiology, University College London. He reviewed the findings.

He has published reports on stress and cardiovascular disease. Researchers at University College London have led the long-running Whitehall Studies, also known as the Stress & Health Study, following more than 10,000 British men and women.

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