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Heart Disease More Likely To Strike Poor

by Medindia Content Team on September 24, 2006 at 11:58 AM
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Heart Disease More Likely To Strike Poor

A study by researchers at the University of Southern California says that low-income adults were more likely to have a higher risk of heart disease, by virtue of having higher levels of C-reactive protein (CRP). The findings of their study appear in the current issue of Brain, Behavior and Immunity. The study said that in low-income adults below the poverty line 15.7 percent had very high levels of CRP, while only 9.1 percent of those above poverty level had high levels.

"We have long known that poor people have worse health," said Eileen Crimmins, corresponding author and professor in the USC Leonard Davis School of Gerontology. "This paper provides evidence that people living at or near the poverty line are almost twice as likely to have very high CRP, which poses risks for long-term, chronic conditions like heart disease and cognitive loss. This may be one of the explanations for why poor people age faster."

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CRP is produced as part of the immune response to inflammation. In healthy individuals, CRP levels return to normal after infection or injury subsides. However, some people have chronically elevated levels of CRP. Recent studies have shown high levels of CRP to be a useful predictor of heart disease.

Recent illness, chronic conditions and lifestyle account for some but not all of the explanations for the association between high CRP levels and socioeconomic standing.
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"We found that even after accounting for various risk factors, people in poverty still had higher CRP," said Dawn Alley, another corresponding author and a recent doctoral graduate from the USC Davis School. "This suggests that even beyond issues like health behaviors and chronic conditions, there is something about poverty that makes people sick, and at least part of this effect is working through CRP."

The study also found that African Americans, Hispanics and women are more likely to have high levels of CRP, and that obesity is the largest contributor to above normal CRP levels.

The findings, which were funded by the National Institutes of Health, provide a better understanding about risk factors for poor health outcomes later in life.

Source: Eurekalert
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