CHICAGO – Unemployment hurts more than your wallet – it may damage your heart. That’s according to a study linking joblessness with heart attacks in older workers.

The increased odds weren’t huge, although multiple job losses posed as big a threat as smoking, high blood pressure and other conditions that are bad for the heart.

The researchers analyzed data on more than 13,000 men and women aged 51 to 75 taking part in an ongoing health and retirement survey partly sponsored by the National Institute on Aging. Since 1992, participants have been interviewed every two years about their employment and health.

The new analysis has several limitations. The data show periods of unemployment but don’t indicate whether people were fired, laid off, out of work while switching jobs, or had voluntarily left a job.

The researchers considered all of these situations “job losses,” but it’s likely the greatest risks for heart attacks were from being fired or laid off, said researcher Matthew Dupre, an assistant professor at Duke University and the lead author. Retirement was not considered unemployment.

Sarah Burgard, a University of Michigan researcher who has studied the relationship between job loss and health, called the research solid but said it would be important to know the reason for the unemployment.

“There probably are differences in consequences of job loss when it’s voluntary or more or less expected” and when it comes as a sudden shock, said Burgard, who was not involved in the study.

The analysis appears in Monday’s Archives of Internal Medicine. An editorial in the journal says the study adds to decades of research linking job loss with health effects and that research should now turn to examining how and why that happens.

Theories include that the stress of losing a job may trigger a heart attack in people with clogged arteries or heart disease; and that the unemployed lose health insurance and access to medical care that can help keep them healthy, Burgard said.

The analysis findings cover 1992 to 2010.