Sentences with phrase «there are false positives»

«In any database, there are false positives and false negatives and records aren't always complete or up - to - date.»

Yet «there are false positives and false negatives.

Will there be false positives?

Just as important, there were no false positives.

Not exact matches

There are numerous false positives of rising VIX on a modest pullback.

Most would say that if the device advertises 99 percent accuracy, then there is a 99 percent chance that the device is correctly discerning a diamond, and a 1 percent chance that it has given a false positive reading.

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

Also, keep in mind that there are those that are sensitive enough to pick up what you intend to listen to and those that are too sensitive that they end up creating many «false positives».

There are a lot of false positives, and parents are getting out of bed terrified because they get an alert.»

But because issues ranging from delays in reporting to false positives can sometimes occur, Wilkerson suggests asking the baby's pediatrician to confirm it came back and if there were any areas of concern.

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

There are different ways to test for Down syndrome screening but the Integrated Test is the most specific, has the highest detection rate and a low false - positive rate.

But even when both of these criteria were true, there were many false positives, meaning that many of these babies» weight was in the normal range.

Studies show these false positives cause some short - term anxiety, but there is not consensus about lasting harm.

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.

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

«Extrapolating our findings, our extremely conservative estimate is that there were 1.7 million individuals with a false - positive cardiac biomarker test in the U.S. over those two years,» Dr. Makam said.

There has not yet been a prominent case of misidentification, or false positive, using a facial recognition system.

But the carbon - dating evidence did not persuade him that people maintain similar stem cell reserves: The method involves «a lot of assumptions and steps in which there can be contamination or false positives,» he says.

«Hydrogen peroxide explosives are a challenge because they are dangerous, but there are so many personal hygiene products that have hydrogen peroxide in them that the false positive rate is very high,» Brotherton said.

Simons is working with the U.S. Geological Survey — in charge of the amphibian monitoring — to account for these false positives, and to better train the volunteers — so they don't write down «chorus frog» [Chorus Frog sound] when all there really was were pickerel frogs.

In addition to the huge hit to your wallet, there's also the potential harm of false positives, and just because a test has traditionally been done for a condition doesn't mean it's the best way to treat it.

At the same time, there are a high number of false positives associated with screening programmes, meaning healthy people are inappropriately identified as having a potential condition, leading to overdiagnosis and overtreatment.

«There definitely are false positives,» Ryan says.

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.

Finally, there is the problem of false positives, which arises from the fact that some of the most important molecules that contribute to the phenotype of metastasis may not be the ones that are most widely expressed.

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].

«There will always be false positives and false negatives,» said Albert.

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.

If you aren't into the math, it means that there is a decent chance that a woman who doesn't have GD will receive a false positive and also a chance that a woman may test negative and actually have GD.

There are also some concerns with the rates of false positives and negatives with the 1 - hour oral screening test, and it is simply that: a screening test and not a diagnostic one.

In fact, as «The Pregnant Mathematician» points out, when the test is evaluated mathematically, there is both a high rate of false positives and false negatives in women who may actually have GD.

There is a high rate of false positives on the 1 - hour glucose challenge test.

«We don't really know the active ingredients; there can actually be something in a supplement that gives false positive or false negative results.»

There is a risk of false positive, which leads to another, longer test.

Although the «regular» alcohol testers measure ethanol and other alcohols (not acetone), there are certain circumstances in which you might show a false positive result: www.ncbi.nlm.nih.gov/pubmed/1689436 0

However, apparently if there is atrophic gastritis, which there was (caused by the h.pylori) then there can be a false positive with a breath test.

Aneuploidy scans are not routinely performed, as many normal pregnancies may have some of these features - ie there is a high false - positive rate.

There are a few fun exercises - crossword, true and false statements, positive and negative words.

[10] They find that given the correlations we typically see among different measures of teacher performance, there is likely to be a significant number of false positives and negatives: teachers falling into one performance category according to one measure and into a different category according to another measure.

«If VAM were 100 percent accurate I would still have a problem with it — but it's not, there are a lot of false positives and false negatives.»

There are three main problems with over testing in schools: (a) student fatigue, (b) practice effects, and (c) false positives.

It's likely this will result in a few false - positive hits, but that accuracy should improve with time (especially as legacy sites start to die out or face redesigns)... but there is another side - benefit that shouldn't be overlooked: Flash content is difficult for search engine spiders to crawl — meaning the overall quality and accuracy of your search results should also improve.

I do not recommend simply running a replacement on this search, however, because there would be too many false positives.

The only reason why this is mentioned here is because although almost all dogs that test positive for EPI do indeed have EPI — there have been extremely rare cases of a false read.

In spite of this, there can be false positives and negatives, so more information and standardization among laboratories is needed before this test will be used routinely.

Since there is the possibility of false positives, veterinarians often recommend retesting, using a test with a different format.

There is a false notion that cats who test positive for feline immunodeficiency virus (FIV +) require special care — but they are no more demanding than your average kitty.

On occasion, false positives can occur, particularly if other parasites (roundworms, etc.) are present or there is another nonpathogenic heartworm present called dipetalonema reconditum.

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).