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Cancer Health Center

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Income Might Influence Risk for Certain Cancers

Lifestyle-related disease, such as lung cancer, is more common among the poor, researchers find

WebMD News from HealthDay

By Steven Reinberg

HealthDay Reporter

TUESDAY, May 27, 2014 (HealthDay News) -- Some cancers in the United States are tied to poverty, while others are more common among the wealthy, researchers report.

In the poorest areas of the country, the incidence of cancer is generally lower than in richer regions, but deaths from cancers are higher, the study authors said.

"Socioeconomic status is not something that appears on a medical record, so it is not really part of national cancer statistics, and this has skewed our thinking about cancer risk," said study co-author Kevin Henry, an assistant professor of epidemiology at Rutgers School of Public Health in New Jersey.

Greater access to screening among the rich, and risky behaviors more common among the poor -- such as smoking -- may help explain the disparities, experts said.

Kaposi sarcoma (a skin cancer common among AIDS patients) and cancers of the larynx, cervix, penis and liver occur more often in the poorest neighborhoods, the investigators found.

Poorer areas also had higher rates of cancers related to drinking, smoking and using injectable drugs. These are considered modifiable risk factors for cancer.

Since smoking rates are higher in poor areas, so is the incidence of smoking-related cancers, said Dr. Ahmedin Jemal, vice president for surveillance research at the American Cancer Society.

Cancers tied to sexually transmitted disease and poor diet were also more likely in the poorest neighborhoods.

In the wealthiest areas, thyroid and testicular cancer, melanoma and other skin cancers were more common, according to the report, published online May 27 in Cancer.

For their study, the researchers used the poverty rate of the patients' neighborhoods -- based on U.S. Census information -- as a measure of socioeconomic status in 16 states and Los Angeles County.

"We had data for almost 3 million cancer diagnoses in an area covering 42 percent of the United States population," Henry said. "This allowed us to look at some rare cancers that are less often studied. Overall, the breadth and depth of our analysis is unprecedented."

Although the researchers found scant association between poverty and cancers in general, for 32 of 39 cancers there was a significant link with economic status. Fourteen cancers were more common in poor areas and 18 were less common.

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