Navigation Links
Elevated liver enzymes associated with higher future mortality
Date:3/3/2008

A new population-based epidemiological study has found that elevated liver enzymes discovered during routine medical care are associated with higher future mortality. The findings are in the March issue of Hepatology, a journal published by John Wiley & Sons on behalf of the American Association for the Study of Liver Diseases (AASLD). The article is also available online at Wiley Interscience (http://www.interscience.wiley.com/journal/hepatology).

Liver enzymes include aspartate aminotransferase (AST) and alanine aminotransferase (ALT), and high concentrations in the blood tend to indicate liver disease. About 10 percent of Americans have an elevated liver enzyme with no evidence of a cause such as hepatitis C or excessive alcohol consumption. Presumably, many cases are due to non-alcoholic fatty liver disease.

Studies in other countries have shown that elevated liver enzymes are associated with future mortality, however the link has never been examined in a U.S. population, so researchers led by Tae Hoon Lee of the Mayo Clinic in Rochester, Minnesota set out to address this question. They used data from Olmsted County, MN, where most of the population has had medical care at Mayo Clinic facilities, and included all adult patients who had their AST or ALT levels measured during routine visits in 1995. Those with levels above the upper limit of normal were followed forward until April 2006 to determine their survival.

AST was measured in 18,401 residents, and 2,350 (13 percent) had results above the upper limit of normal. Of 6,823 people who had their ALT measured, 911 (13 percent) had results higher than the upper limit of normal.

After excluding those who moved away from the community, or died within two years (to rule out terminal illness as the cause of the abnormal liver enzyme levels), the researchers used the Kaplan-Meier method to estimate survival. They compared their results to mortality data for Minnesota Whites and found that elevated AST was associated with a significantly increased standardized mortality rate (SMR). Elevated ALT was also associated with a higher SMR. The SMRs ranged between 1.21 and 1.78.

We demonstrate that serum AST and ALT activities are associated with increased risk of mortality in the ensuing decade, the authors report. The relation between the aminotransferase results at the outset and the subsequent risk of death (excluding the first two years) was almost linear. It is clearly shown that these simple, inexpensive blood tests may represent valuable indicators of long-term outcome.

While the precise reasons for the association are unclear, some in the population undoubtedly had elevated enzymes as a result of serious liver disease. In addition, the authors suggest that elevated serum AST and ALT may be markers of cardiovascular diseases (nearly 34 percent of the deaths in the study population were due to cardiovascular causes). Other conditions such as chronic alcohol consumption or abuse may have contributed to the risk of death as well.

They study had limitations. First, the population was not a random sample and they were community residents who had reasons for receiving medical care. Second, their aminotransferase levels were only measured once. Lastly, they were mostly Caucasian, reducing the generalizability of the data. Still, the findings are strong.

These data, based on a large number of residents in a U.S. community, suggest that serum levels of AST and ALT obtained in a routine medical care setting are associated with future mortality, the authors conclude.


'/>"/>

Contact: Amy Molnar
amolnar@wiley.com
Wiley-Blackwell
Source:Eurekalert

Related medicine news :

1. CRESTOR(R) Now Indicated to Slow the Progression of Atherosclerosis in Patients With Elevated Cholesterol
2. Store-bought freshwater fish contain elevated levels of mercury, arsenic and selenium
3. Ranexa(R) Significantly Reduces Incidence of CV Death, MI or Recurrent Ischemia in MERLIN TIMI-36 Patients With Elevated BNP
4. Impact of elevated homocysteine levels on vision under study
5. In early childhood, continuous care by 1 doctor improves delivery of health screenings
6. Survival rates exceed national averages for UCSF heart, liver and lung transplant programs
7. Milestone Scientific Hosts First International Computer-Controlled Local Anesthetic Delivery (CCLAD) Summit
8. The Female Health Company Receives USAID DELIVER PROJECT Order for 6.1 Million Units
9. Tysabri May Cause Liver Damage, Health Officials Say
10. eDiets(R) Launches Fresh Meal Delivery Program for alli(R) Users
11. Kendle Delivers Strong Growth in Revenues, New Business Authorizations and Operating Margin for Full-Year 2007; Announces Guidance for 2008
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... PawPaws brand pet supplements ... that was developed to enhance the health of felines. The formula is all-natural and ... main herbs in the PawPaws Cat Kidney Support Supplement Soft Chews are ...
(Date:6/25/2016)... ... , ... Austin residents seeking Mohs surgery services, can now turn to Dr. ... Russell Peckham for medical and surgical dermatology. , Dr. Dorsey brings specialization to include ... in Mohs Micrographic Surgery completed by Dr. Dorsey was under the direction of Glenn ...
(Date:6/25/2016)... CA (PRWEB) , ... June 25, 2016 , ... As ... with Magna Cum Laude and his M.D from the David Geffen School of Medicine ... and returned to Los Angeles to complete his fellowship in hematology/oncology at the UCLA-Olive ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article published June 14 ... The article goes on to state that individuals are now more comfortable seeking to ... operations such as calf and cheek reduction. The Los Angeles area medical group, Beverly ...
(Date:6/24/2016)... ... June 24, 2016 , ... The Pulmonary Hypertension Association (PHA) ... will receive two significant new grants to support its work to advance research ... anniversary by recognizing patients, medical professionals and scientists for their work in fighting ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016  Collagen Matrix, ... design, development and manufacturing of collagen and mineral ... announced today that Bill Messer has ... Marketing to further leverage the growing portfolio of ... devices. Bill joins the Collagen Matrix ...
(Date:6/24/2016)... -- The Academy of Managed Care Pharmacy (AMCP) today ... allow biopharmaceutical companies to more easily share health care ... coverage decisions, a move that addresses the growing need ... The recommendations address restrictions in the sharing of product ... a prohibition that hinders decision makers from accessing HCEI ...
(Date:6/24/2016)... 2016   Pulmatrix, Inc ., (NASDAQ: ... drugs, announced today that it was added to the ... its comprehensive set of U.S. and global equity indexes ... important milestone for Pulmatrix," said Chief Executive Officer ... our progress in developing drugs for crucial unmet medical ...
Breaking Medicine Technology: