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Mayo researchers find mortality rates from liver diseases underestimated

2010-11-02
(Press-News.org) ROCHESTER, Minn. -- Statistics from the Centers for Disease Control and Prevention (CDC) (http://www.cdc.gov/) rank mortality related to chronic liver disease and cirrhosis as the 12th most common cause of death in adults in the U.S. Using a modified definition that includes diseases such as viral hepatitis, liver cancer (http://www.mayoclinic.org/liver-cancer/) and obesity-related fatty liver disease (liver diseases)(http://www.mayoclinic.org/liver-disease/), Mayo Clinic-led researchers have found that liver-related mortality is as high as fourth for some age groups, and eighth overall. The findings are being presented today at the American Association for the Study of Liver Diseases 61st Annual Liver Meeting (http://publish.aasld.org/thelivermeeting/Pages/default.aspx) in Boston.

"The methodology that the CDC uses to define liver-related mortality is somewhat limited," says W. Ray Kim, M.D., (http://www.mayoclinic.org/bio/11801271.html) a gastroenterologist with Mayo Clinic. "They only look at a certain diagnostic code, and deaths due to other facets of liver disease are not included.

"There are a large number of people with hepatitis C in the U.S. They are getting older and experiencing complications. Also, associated with the 'obesity epidemic,' a large number of individuals have fatty liver disease. Some go on to develop end-stage liver disease, cirrhosis, or liver cancer. In order to discover the true impact of liver disease on the population, we analyzed mortality data using these more comprehensive criteria."

The research team examined data from the CDC's national death registry for deaths among adults during 1979-2006 and compared their results to statistics from the Rochester Epidemiology Project, (http://www.mayoresearch.mayo.edu/rep/) a long-term, collaborative medical records project among health care providers in Olmsted County, Minn.

"We had a good correlation between the national statistics and the Olmsted County mortality data," says Dr. Kim. "Of course, the most common cause of death for adults is cardiovascular disease and cancer. However, we found that liver disease is not far behind in terms of being No. 4 for people between the ages of 45 and 64 years."

Dr. Kim says that obese people and those with hepatitis C need to be watched especially closely for liver disease as part of their overall medical management program. "Liver disease is an important cause of morbidity and mortality in the U.S. -- more than we have recognized in the past -- and as physicians, we need to be aware of that," he says.

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Co-authors of the study include Sumeet Asrani, M.D.; Patrick Kamath, M.D.; Rachel Pedersen; Jennifer St. Sauver, Ph.D.; and Terry Therneau, Ph.D., all of Mayo Clinic; and Barbara Yawn, M.D., of Olmsted Medical Center in Rochester.

About Mayo Clinic

For more than 100 years, millions of people from all walks of life have found answers at Mayo Clinic. These patients tell us they leave Mayo Clinic with peace of mind knowing they received care from the world's leading experts. Mayo Clinic is the first and largest integrated, not-for-profit group practice in the world. At Mayo Clinic, a team of specialists is assembled to take the time to listen, understand and care for patients' health issues and concerns. These teams draw from more than 3,700 physicians and scientists and 50,100 allied staff that work at Mayo Clinic's campuses in Minnesota, Florida, and Arizona; and community-based providers in more than 70 locations in southern Minnesota, western Wisconsin and northeast Iowa. These locations treat more than half a million people each year. To best serve patients, Mayo Clinic works with many insurance companies, does not require a physician referral in most cases and is an in-network provider for millions of people. To obtain the latest news releases from Mayo Clinic, go to www.mayoclinic.org/news. For information about research and education, visit www.mayo.edu. MayoClinic.com (www.mayoclinic.com) is available as a resource for your general health information.

Contact:
Rebecca Eisenman
507-284-5005 (days)
507-284-2511 (evenings)
e-mail: newsbureau@mayo.edu

END



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[Press-News.org] Mayo researchers find mortality rates from liver diseases underestimated