Featured Research

from universities, journals, and other organizations

Use of low-dose aspirin associated with improved performance of test for detecting colorectal cancer

Date:
December 8, 2010
Source:
JAMA and Archives Journals
Summary:
Use of low-dose aspirin prior to a newer type of fecal occult blood test is associated with a higher sensitivity for detecting advanced colorectal tumors, compared to no aspirin use, according to a new study.

Use of low-dose aspirin prior to a newer type of fecal occult blood test is associated with a higher sensitivity for detecting advanced colorectal tumors, compared to no aspirin use, according to a study in the December 8 issue of JAMA.

"Screening for colorectal cancer (CRC) and its precursors by fecal occult blood tests (FOBTs), which has been shown to reduce CRC incidence and mortality in randomized trials, is widely recommended and applied in an increasing number of countries. Screening is mostly done in age groups in which use of low-dose aspirin for primary or secondary prevention of cardiovascular disease is increasingly common. Use of low-dose aspirin increases the likelihood of gastrointestinal bleeding, especially upper gastrointestinal bleeding. Because of the increased risk of bleeding from sources other than colorectal neoplasms [tumors], concerns have been raised regarding possible adverse effects on specificity of FOBT-based screening for CRC," according to background information in the article. Potential false-positive test results due to increased risk of upper gastrointestinal bleeding are expected to be of less concern for increasingly available immunochemical FOBTs (iFOBTs; a type of test to check for blood in the stool), but evidence is sparse about the performance of iFOBTs for patients who use low-dose aspirin.

Hermann Brenner, M.D., M.P.H., of the German Cancer Research Center, Heidelberg, Germany, and colleagues assessed the association of use of low-dose aspirin with performance of 2 iFOBTs in a large sample of women and men who underwent CRC screening. The study, conducted from 2005 through 2009, included 1,979 patients (average age, 62.1 years): 233 regular users of low-dose aspirin (167 men, 67 women) and 1,746 who never used low-dose aspirin (809 men, 937 women). The researchers analyzed measures of sensitivity and specificity in detecting advanced colorectal neoplasms (colorectal cancer or advanced adenoma [a tumor that is not cancer]) with 2 quantitative iFOBTs (hemoglobin test and hemoglobin-haptoglobin [a protein] test).

Advanced neoplasms were found in 24 users (10.3 percent) and 181 nonusers (10.4 percent) of low-dose aspirin. The researchers found that for the hemoglobin test, sensitivity was 70.8 percent for low-dose aspirin users compared with 35.9 percent for nonusers; specificity was 85.7 percent for users compared with 89.2 percent for nonusers. For the hemoglobin-haptoglobin test, sensitivity was 58.3 percent for users compared with 32 percent for non-users and specificity was 85.7 percent for users compared with 91.1 percent for nonusers.

"We provide a detailed comparison of the diagnostic performance of 2 quantitative iFOBTs among users and non-users of low-dose aspirin in the target population for CRC screening. For both tests, sensitivity was markedly higher, while specificity was slightly lower among users of low-dose aspirin compared with nonusers," the authors write.

"… our study strongly suggests that use of low-dose aspirin does not hamper testing for fecal occult blood by immunochemical tests. On the contrary, our findings raise the hypothesis that test performance may be enhanced by temporary use of low-dose aspirin, a hypothesis that needs replication in larger samples and followed up in further research, ideally including randomized trials and different types of FOBTs."


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. H. Brenner, S. Tao, U. Haug. Low-Dose Aspirin Use and Performance of Immunochemical Fecal Occult Blood Tests. JAMA: The Journal of the American Medical Association, 2010; 304 (22): 2513 DOI: 10.1001/jama.2010.1773

Cite This Page:

JAMA and Archives Journals. "Use of low-dose aspirin associated with improved performance of test for detecting colorectal cancer." ScienceDaily. ScienceDaily, 8 December 2010. <www.sciencedaily.com/releases/2010/12/101207190407.htm>.
JAMA and Archives Journals. (2010, December 8). Use of low-dose aspirin associated with improved performance of test for detecting colorectal cancer. ScienceDaily. Retrieved April 19, 2014 from www.sciencedaily.com/releases/2010/12/101207190407.htm
JAMA and Archives Journals. "Use of low-dose aspirin associated with improved performance of test for detecting colorectal cancer." ScienceDaily. www.sciencedaily.com/releases/2010/12/101207190407.htm (accessed April 19, 2014).

Share This



More Health & Medicine News

Saturday, April 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nine-Month-Old Baby Can't Open His Mouth

Nine-Month-Old Baby Can't Open His Mouth

Newsy (Apr. 19, 2014) Nine-month-old Wyatt Scott was born with a rare disorder called congenital trismus, which prevents him from opening his mouth. Video provided by Newsy
Powered by NewsLook.com
'Holy Grail' Of Weight Loss? New Find Could Be It

'Holy Grail' Of Weight Loss? New Find Could Be It

Newsy (Apr. 18, 2014) In a potential breakthrough for future obesity treatments, scientists have used MRI scans to pinpoint brown fat in a living adult for the first time. Video provided by Newsy
Powered by NewsLook.com
Little Progress Made In Fighting Food Poisoning, CDC Says

Little Progress Made In Fighting Food Poisoning, CDC Says

Newsy (Apr. 18, 2014) A new report shows rates of two foodborne infections increased in the U.S. in recent years, while salmonella actually dropped 9 percent. Video provided by Newsy
Powered by NewsLook.com
Scientists Create Stem Cells From Adult Skin Cells

Scientists Create Stem Cells From Adult Skin Cells

Newsy (Apr. 17, 2014) The breakthrough could mean a cure for some serious diseases and even the possibility of human cloning, but it's all still a way off. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins