Sentences with phrase «result is a false positive»

In these instances, the kitten should be tested again when they are six months old to determine if the result was a false positive or if the kitten really is FIV +.

When the result is a false positive, the the dog is not allergic to the food burt when ingested it results in a positive allergic skin response.

Not exact matches

Amazon says the problem was the result of a false positive.

A new genetic test that analyzes the free DNA floating in a pregnant woman's blood was proven to be more effective at predicting chromosomal disorders compared with standard screening tests, due to its much smaller incidence of false - positive results.

THE BIOPSY»S DANGEROUS CASCADE: HOW TO LESSEN THE NEED FOR INVASIVE TESTING Intervention Track Hosted By: Insigniam Current medical tests are too often marred by high rates of overdiagnosis («false positive» results) or they too often miss the danger altogether («false negatives»).

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.

Deactivating the enzymes is done to prevent them from reacting with the assay in an unintended way and causing false positives results.

Past performance is no guarantee of future results, August is packed with false positives, and there's no morals clause for the postseason.

First, the number of false positive results is rather high and varies widely by state.

The only medications really known to cause false results, false positives specifically, are those medications containing hCG In these cases, your doctor or fertility center will tell you not to take a pregnancy test until these medications have cleared your system.

There is some evidence that the use of continuous electronic fetal monitoring may lead to increased false positives for fetal hypoxemia and to resulting caesarean sections.21, 22

Babies with a positive result sometimes turn out not to have the disease — what's known as a false positive.

That will tell us if the problem of false - positive results in the psychology journals is big, small or non-existent.

«New tests are more exact and are not as susceptible to the same false - positive or false - negative results associated with current tests,» said Schutzer.

Because ovarian cancer is relatively rare, occurring in approximately one out of every 2,500 women, a test with only 99 percent specificity would result in false - positive diagnoses for 25 women, leading to unnecessary and risky surgeries and procedures.

Where DNA is hard to isolate, one danger is obtaining «false positive» results.

It must be sensitive enough to highlight potential problems, but not so broad that it generates high numbers of false - positive results, said Dr. Dean Foti, a clinical assistant professor of neurology at the University of British Columbia.

«Such a high rate of a false positives in this particular study was unexpected,» says Tandy - Connor, who believes that some of the discrepancies in the results can be explained by technical differences between the various testing methods used.

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.

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.

Given the lack of mortality benefit of screening, and the moderate to substantial harms that could result from false - positive screeningtest results and subsequent surgery, the USPSTF concludes with moderate certainty that the harms of screening for ovarian cancer outweigh the benefit, and the net balance of the benefit and harms of screening is negative.

Researchers believe there are two explanations for the very high false positive results from the first stage of the screening process.

As a result, blood tests may be detecting the presence of other mycobacterial infections; they may also produce false positives when antibody levels remain elevated after cases of TB have been treated.

Vexing to doctors, the great majority of positive results are false, not because the tandem mass spec or the other assays have made errors but because certain babies are «borderline normal.»

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.

Small study size, design flaws, publication bias (failure to publish negative results or duplication of positive results), drug - industry influence, and the play of chance were among the problems Ioannidis found that caused false or exaggerated claims.

Follow - up interviews were obtained from 1,028 of the women (534 with negative results, 494 with false - positive results).

Mammograms with false - positive results were associated with increased short - term anxiety for women, and more women with false - positive results reported that they were more likely to undergo future breast cancer screening.

It's highly likely, however, that you have fallen victim to a false positive — a result that, despite the accuracy of the test, erroneously yields an affirmative result that points toward illness.

While the result is false, the psychological toll is real, and so are the billions of dollars spent every year on tests and procedures performed as a result of false positives.

Results from these tests provide also in many cases insights into the nature of the sources of the false positives, which are generally produced by one of several kinds of configurations involving eclipsing binaries (EB).

What I like about this study is that the authors looked at sequencing errors first, to precisely classify the sources of false - positives, and then built their variant - calling algorithm around the results.

This observational result, which uses the achromatic property of planetary transit signals that is not investigated by the Kepler observations, provides an independent indication that Kepler's false positive rate is low.

In addition, we identify 428 KOIs likely to be false positives that have not yet been identified as such, though some of these may be a result of unidentified transit timing variations.

She worries that it can yield too many false positive or false negative test results, creating either unnecessary emotional turmoil or unwarranted relief, when there really should be extra attention and care.

After adjusting for common factors that influence breast cancer risk, Henderson and colleagues found that women whose mammograms were classified as false - positive who were referred for additional imaging had a 39 percent increased chance of developing subsequent breast cancer during the 10 - year follow - up period, compared with women with a true - negative result.

«Our next steps are to consider how to incorporate a prior false - positive mammogram and biopsy results into risk - prediction models for breast cancer,» she said.

Unfortunately, indels are both the strength and the weakness of 454 data — due to the underlying pyrosequencing, homopolymeric regions are often under - or over-called, resulting in numerous false positives.

Women whose mammograms were classified as false - positive but were referred for a breast biopsy had a 76 percent increased chance of developing subsequent breast cancer compared with women with a true - negative result.

«Our finding that breast cancer risk remains elevated up to 10 years after the false - positive result suggests that the radiologist observed suspicious findings on mammograms that are a marker of future cancer risk,» said the study's lead author, Louise M. Henderson, PhD, a UNC Lineberger member and an assistant professor of radiology at the UNC School of Medicine.

«The meta - analytic study requires a certain number of studies (at least 17 - 20 experiments) to detect smaller effects and to avoid false - positive results (if the findings are driven by the effect of single experiments),» Zinchenko said.

For the LTQ - Orbitrap Velos data, the distribution of mass deviation (from the theoretical masses) was first determined as having a standard deviation (σ) of 2.05 part per million (ppm), and a mass error of smaller than 3σ was used in combination with Xcorr and ΔCn to determine the filtering criteria that resulted in < 1 % false positive peptide identifications.

«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.

Clinical examination and imaging technologies are critical elements for detecting and diagnosing breast cancer, yet the high rate of false positives and false negatives resulting from these approaches can significantly impact patient care.

It is apparently notorious for producing «false positive» results.

It is clear, however, that evidence of an excess of amino acid substitutions (at least from site - by - site tests) is no longer a sufficiently convincing demonstration of selection, not only because a high ratio could result from selection on synonymous mutations rather than positive selection on proteins [5], but also because there is potentially a high false discovery rate of selected sites [6].

It's wasn't clear how false - positive results affect people's willingness to undergo cancer screening in the future.

Less than 3 percent of the time did it produce a «false positive» result, which mistakenly indicates the presence of cancer when there is none.

In fact, the FDA has been cracking down on some services in recent years, pointing out the health risks posed by possible false positive or false negative results.

Men with a false - positive prostate cancer screening were at least 22 percent more likely to have future colon cancer screenings compared to men who did not have an inaccurate positive test result.