Sentences with phrase «of false negative results»

The high number of false negative results found in the study implies a risk that athletes who use rHuEpo will avoid detection and damage the fundamental goal of fair competition.

Health authorities say the number of false negative results from the tests is probably small but AIDS hotlines were jammed last week with inquiries from people worried by the implications.

This lower rate of false negative results is a key benefit of the HPV screening.

Not exact matches

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).

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»).

It said this was as a result of his alleged negative comments about Nigerians and his presentation of false performance indices to his hosts.

Because only about 16 in every 100,000 people end their own lives, a test with such a level of accuracy will give many false positive and false negative results if used on the general population.

When the results were compared with studies in the literature using standard radiocolloid tracers the researchers found that the SN biopsy using tilmanocept provided a high identification rate and low false negative rate for SNs, thus facilitating accurate prediction of the spread of the cancer.

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.

The technology successfully detected the cancer cells with less than 1 percent incidence of false - negative results.

the test is not sensitive enough to detect low levels of the T790M mutation, resulting in a false negative;

Almost two thirds of all laboratories showed false - positive or false - negative results.

«We observed both false - positive and false - negative results in some of the laboratories,» Drexler briefly summarises the results.

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).

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.

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.

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.

A doctor can also fail to get enough of a tissue, blood, or urine sample or take a sample from the wrong place, perhaps giving a false - negative result when disease is present, explains David S. Wilkinson, MD, PhD, professor and chair of the department of pathology at Virginia Commonwealth University, in Richmond, Va., and chair of the quality - practice committee for the College of American Pathologists, which accredits U.S. and foreign labs.

Women with denser breasts tend to be younger, healthier women, which means healthier women are actually at an increased risk of getting a false result — either a false positive or false negative.

Most false negative results occur when levels of human chorionic gonadotropin (hcg) in the urine are too low for the test to detect pregnancy.

About 10 percent to 15 percent of people have so - called «false - negative» blood test results (negative blood test results but a positive biopsy) even when they're eating a gluten - filled diet, according to Dr. Alessio Fasano, head of the Massachusetts General Hospital Center for Celiac Research.

The tests suck (lots of false negatives) so take activated charcoal before hand to get better results.

A person can be born with an immunodeficiency or acquire it through: infection repeated antibiotic use steroid use (including steroid inhalers) disease malnutrition burns long - term, low - level demands increased immunoglobulin response as a side effect of different pharmaceuticals that can suppress the immune system An immunodeficiency could cause your test results to be inaccurate, giving a false negative.

One cause of false - negative results is high breast density.

What we have now does not look like a false negative but rather a very poorly designed program in Louisiana with the release of a new study on the first year results.

However, it is not a very sensitive means of heartworm detection in the cat (i.e., there is a high chance of false negative test results).

There is a window period of six to seven months where the test may reveal a false negative result.

However, it usually takes eight to 12 weeks after infection for detectable levels of antibody to appear in the bloodstream, so testing performed during this interval may result in false negative results.

Although PCR testing methods offer promise, these techniques result in relatively high numbers of false - positive and false - negative results, so they are not routinely being recommended.

Premature cessation of scraping before a small amount of blood is observed on the blade may lead to a false - negative result.

For years, I evaluated and diagnosed pets with in - house fecal flotation with centrifugation but always saw variability in my test results, misdiagnosis of parasites, and false negative results.

Because false - negative test results are possible, particularly in light infections, the term Below Detectible Limits (BDL) provides a more accurate description of a «negative» test result.

Antigen testing is not as effective at detecting infection with adult worms < 5 months old and is unable to detect immature worm infections, male - only infections, and some infections with only one adult female worm.1 If the infection does not produce an adult worm, the worms are immature at the time of testing, or only male adult worms are present, a false - negative result may be obtained.

Diagnosis of canine dirofilariosis in animals which originate from a low - endemic region is difficult for 3 main reasons: 1) possible absence of circulating microfilariae (occult disease), 2) high frequency of a low number of adults, which in turn produces false negative results, using either ELISA or latex agglutination test, 3) possible false sero - positive results, due to cross-reaction with adult antigens of Dirofilaria (Nochtiella) repens (Schrey, 1996), the agent of subcutaneous dirofilariasis causing chronic pruritic dermatitis in dogs (Tarello, 1999).

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.

As for a false negative, some food allergies produce a delayed result of a positive allergic reaction and the positive diagnosis is missed.

Owners should not rely on the results of over-the-counter human urine drug screening tests to diagnose dogs for marijuana exposure because the success rate is highly inconsistent and false negatives do occur, according to the Pet Poison Helpline.

If a striking clinic combined with negative serology exists, they should be retested due to the possibility of false - negative results.

Because the magnitude of the counter acting effects depends on the degree of non-linearity, the rms of the residuals to a linear fit, the length of the trend and the temporal auto - correlation of the «weather noise», it is difficult to generalize whether the method will generally result in too many false positives or negatives.

The government's avowed determination to eradicate myths about supposedly true victim behaviour, in spite of there being no UK research evidence of a negative impact by such myths on the conviction rate, makes a stark contrast with their apparent insouciance about the potentially negative impact on the conviction rate as a cumulative result of potential jurors reading lurid media accounts of the exposure of false rape claims.

Pap tests have a false negative rate of about 10 to 20 percent of all negative results, which might sound like a cause for alarm — but in practice, among those who receive regular Pap testing, cellular abnormalities that are missed once are, eventually, usually caught in time to be easily treated.

And a false negative result might allow precancerous cells to develop into cancer if they are not detected in a future round of Pap testing.

The purpose of this is to avoid creating a false, negative perspective of him or her as a result of your current state.