THURSDAY, Feb. 7 (HealthDay News) -- The hassles and deadlines
at work may leave you frazzled, but they won't raise your risk for
cancer, new research suggests.
Despite earlier studies suggesting an association between work
stress and cancer, an international team of researchers found that
it wasn't linked to colorectal, lung, breast or prostate
"We already know from other studies that work-related stress is associated with many adverse health outcomes, such as heart disease and depression," said lead researcher Katriina Heikkila, from the Finnish Institute of Occupational Health in Helsinki.
"Our findings suggest that stress at work is unlikely to be an important cancer risk factor. Though reducing work stress would undoubtedly improve the psychological and physical well-being of the working people, it is unlikely to have a marked impact on cancer," Heikkila said.
Commenting on the new report, Dr. Lidia Schapira, associate
editor for psychosocial oncology at the American Society of
Clinical Oncology's Cancer.Net, said, "I am encouraged that there
is now some evidence that uncouples job strain and life stresses
People worry a lot when they are under stress, and they then
worry that their worrying is going to impact their health, she
"We know stress can affect the body's reactions [and] increase inflammation, which is associated with an increased risk of cancer, so there is good reason to worry," said Schapira, who is also an assistant professor in the department of medicine at Harvard Medical School in Boston.
"I think people should address stress just because stress is uncomfortable and impacts on one's wellness and well-being and quality of life," Schapira said. "But good scientists have given it a hard look, and we really can't connect the dots [between] being stressed at work to getting cancer."
The analysis was published online Feb. 7 in the
To see what role job stress might play in the risk of developing
cancer, Heikkila's group collected data on 116,000 men and women,
aged 17 to 70, from Finland, France, the Netherlands, Sweden,
Denmark and the United Kingdom.
All of these people had taken part in one of 12 studies where
they were asked about the amount of stress on their job.
The researchers defined several types of job stress: high-stress
jobs, with high work demands and low control over work; active
jobs, with high demands and high control; passive jobs, with low
demands and low control; and low stress jobs, with low demands and
The investigators then turned to cancer death registries and
hospital records to see how many people developed or died from
cancer. They further refined their search by taking age, sex,
socioeconomic factors, smoking and alcohol use into account.
In addition, the researchers excluded anyone who was extremely
overweight or underweight.
Over an average 12 years of follow-up, more than 5,700 people
developed some type of cancer.
Heikkila's team didn't find any connection, however, between
cancer and job stress. It is possible that other studies that found
a connection between job stress and cancer found the association by
chance or included other work-related factors that went beyond
work, the Finnish researchers said.
For this type of study, called a meta-analysis, researchers comb
through already published studies looking for patterns in the data.
Often, the patterns they find go beyond the original intent of the
studies they are examining.
The downside of a meta-analysis is that the data the researchers
choose is only as good as the data in the studies they use, and
their conclusions can't always take into account problems with the
Elizabeth Ward, national vice president of intramural research
at the American Cancer Society, said it is hard to conclude from
this analysis that work stress doesn't play a role in cancer.
"One way job stress could impact cancer is if people who have stress are more prone to be smokers or drink more alcohol, or be obese," she explained.
When the researchers tried to eliminate these factors from their
data, they could be hiding a substantial number of people for whom
stress leads directly to behaviors known to increase the risk for
cancer, Ward noted.
For more on stress and cancer, visit the
U.S. National Cancer Institute.
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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