Sentences with phrase «false positive results»

Does the risk of false positive results outweigh the benefit of preventing a small number of deaths from breast cancer?
This study leaves open the question of whether the green tea tested in this study is contaminated with gluten or if something in the green tea is causing false positive results.
Researchers believe there are two explanations for the very high false positive results from the first stage of the screening process.
However, used on their own, currently available self - assessments aren't perfect, often producing exaggerated false positive results.
First, the number of false positive results is rather high and varies widely by state.
Used in conjunction with mammography, imaging based on nuclear medicine is currently being used as a successful secondary screening alongside mammography to reduce the number of false positive results in women with dense breasts and at higher risk for developing breast cancer.
While there are a number of portable tests for cocaine commercially available, these are mainly based on antibody reagents, which can not offer quantitative data and — since the cocaine antibody can bind to something that is not cocaine — can give false positive results.
Spotting these reactions requires a huge detector the size of a small office building, housed about a mile underground to shield it from cosmic rays that could yield false positive results.
«Good as gold: Researchers use gold nanoparticles to enhance the accuracy of biomedical tests, thereby eliminating false positive results
Zhong and his team tested the method's accuracy by seeing if it produced false positive results.
«By running a gel, we perturb the nanoswitches with an electric field to reduce false positive results using a process called «kinetic proofreading,»» Wong explains.
Walker cross-tests every antiserum with samples from other species to ensure it's only identifying proteins from its target, rather than providing false positive results.
The findings indicate that this screening strategy achieves high specificity with very few false positive results in post-menopausal women.
After any heartworm treatment, the antigen heartworm tests have a greater incidence of false positive results since the test is for antigens that are released from dead heartworms as well as live heartworms.
In many situations the breath test machine yeilds inaccurate false positive results.
«Assuming that the government scientists have used the same technique as Chapella and Quist, they are using a fearsomely sensitive technique which is very prone to giving false positive results.
Deactivating the enzymes is done to prevent them from reacting with the assay in an unintended way and causing false positives results.
Detecting antineutrinos requires a huge detector the size of a small office building, housed about a mile underground to shield it from cosmic rays that could yield false positive results.
Compared to conventional RT - PCR, real - time RT - PCR has several advantages such as rapidity, low risk of false positive results, high sensitivity, specificity and the possibility of quantitative measurements.
They suggest most women in their 40s should not have routine mammograms because the tests may cause more harm than good because of false positive results (follow - up testing proves negative for cancer).
With increased throughput, the ability to identify multiple key allergens at once from a number of different food types, and advanced peptide signature detection, SCIEX report a greatly reduced chance of both false negative and false positive results.
They will experience what a pregnant woman goes through from morning sickness to a growing belly which will bring a false positive result when they try the test.
In addition, more than half of women who get annual screenings for 10 years can expect to have a false positive mammogram that requires additional images, and about 20 percent of these false positives result in unnecessary biopsies.
The study, authored by a team of international researchers led by UTSC Assistant Professor Hanno Rein from the Department of Physical and Environmental Science, finds the method used to detect biosignatures on such planets, known as exoplanets, can produce a false positive result.
False positive results can occur with both types of test.
The study, appearing March 9 in the journal Scientific Reports, directly tested the antibodies used in previous analyses and showed that they cross-reacted with proteins other than irisin, yielding a false positive result.
One might accept a higher chance of a false positive result in a preliminary study, for instance, whereas a drug trial might require a lower p - value.
Port noted that screening guidelines tend to be based on the ability of mammograms to save lives and how often they give a false positive result.
5: Put food to be challenged on your tongue and wait for 20 seconds (do not chew and swallow as this can cause a false positive result);
If you're stressed about it or have a needle phobia that can give you a false positive result.
Eating foods that contain Poppy Seeds can cause a false positive result for opiates when drug tested.
It should be noted that tests on kittens under 6 months of age frequently result in false positive results and should be deemed unreliable.
This is because the test may give a false positive result if the kitten has been exposed to FIV through the mother, but has not caught the disease.
False negative or false positive results are possible with a marker test.
Young kittens may exhibit a false positive result for FIV due to transmission of antibodies from the mother cat even though the kitten does not have FIV.
If your veterinarian suspects that this is the case, there are other tests that can be used to confirm the diagnosis (although these can also return a false positive result).
IDEXX claims that the Spec cPL test has a sensitivity greater than 95 percent, meaning almost every dog with pancreatitis will test positive (fewer than 5 percent false negatives), and a specificity also greater than 95 percent, meaning fewer than 5 percent of dogs who don't have pancreatitis will have a false positive result.
In this study, false positive results were found least often with the IDEXX brand test, and the false - positive result was always a weak positive on the test, as opposed to a strong positive.
False positive results are possible, but seem quite rare based on studies and empirical evidence.
However, the rate of false positive results is likely to increase when testing is performed on animals without clinical signs or who have not come from a high - risk situation.
In addition, cats that have been given the FIV vaccine may yield a false positive result.
In healthy, low - risk populations FIV is quite uncommon, and this leads to an increase in the relative number of false positive results.
False positive results are very uncommon.
Less obvious is the potential harm of false positive results and subsequent costly or invasive procedures.
Unlike PRCD tests offered for other breeds, this marker test is specific for Tollers and results in a greatly reduced chance (0.05 percent or less) of false positive results.
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