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'Western' Diet Increases Heart Attack Risk GloballyBad diet choices have repercussions across the world |
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October 22, 2008
The typical Western diet -- fried foods, salty snacks and meat -- accounts for about 30 percent of heart attack risk across the world, according to a study of dietary patterns in 52 countries reported in Circulation: Journal of the American Heart Association. Researchers identified three dietary patterns in the world: Oriental: higher intake of tofu, soy and other sauces; Prudent: higher intake of fruits and vegetables; and Western: higher intake of fried foods, salty snacks, eggs and meat. The Prudent diet was associated with a lower heart attack risk than the Oriental, researchers said. "The objective of this study was to understand the modifiable risk factors of heart attacks at a global level," said Salim Yusuf, D.Phil., the study's senior author. Previous studies have reached similar conclusions about the Prudent and Western diet in the United States and Europe. This study broadens those findings and identifies a unique dietary pattern that researchers labeled "Oriental" (because of a higher content of food items typical of an Oriental diet.) The dietary pattern recommended by the American Heart Association is similar to the Prudent diet described in this study. "This study indicates that the same relationships that are observed in Western countries exist in different regions of the world," said Yusuf, professor of medicine at McMaster University and director of the Population Health Research Institute at Hamilton Health Sciences in Ontario, Canada. Researchers analyzed the INTERHEART study, which documents the association of various risk factors and the risk of heart attack in about 16,000 people in 52 countries. Here, they analyzed 5,761 heart attack cases and compared them to 10,646 people without known heart disease (controls). The researchers created a dietary risk score questionnaire for heart attack patients, based on 19 food groups and adjusted it for dietary preferences for each country. Trained medical personnel interviewed the heart attack patients and the control group. The questionnaires included healthy food items (such as fruits and vegetables) and unhealthy food items (such as fried foods and salty snacks). "A simple dietary score, which included both good and bad foods with the higher score indicating a worse diet, showed that 30 percent of the risk of heart disease in a population could be related to poor diet," said Romania Iqbal, Ph.D., lead author of the study. After adjusting for known risk factors, researchers found: People who consumed the Prudent diet of more fruits and vegetables had a 30 percent lower risk of heart attack than those who ate little or no fruits and vegetables. People who consumed the Western diet had a 35 percent greater risk of having a heart attack compared with people who consumed little or no fried foods and meat. The Oriental pattern showed no relationship with heart attack risk. Researchers said that while some components of the Oriental pattern may be protective, others such as the higher sodium content of soy sauces might increase cardiovascular risk, neutralizing any relationship. It's expensive and time-consuming to establish a large and long-term study examining the relationship of diet and heart attack in every region of the world. So the approach of this study is the only feasible way to examine the relationship to diet and heart disease from multiple populations in a relatively short time at an affordable cost, Yusuf said. Data from this study helped confirm that changes in dietary intake, including the consumption of more fruits and vegetables, can help reduce the risk of having a heart attack in populations worldwide, he said. "At the same time," Yusuf said, "an unhealthy dietary intake, assessed by a simple dietary risk score, accounts for nearly one-third of the world population's attributable risk." Report Your Experience
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