Sentences with phrase «cause false negatives»

Certain thyroid conditions, such as hypothyroidism, can cause false negatives in pregnancy tests.

If we do not find them, something during the analysis impedes detection and causes a false negative.»

And, finally, in any dog with a very low heartworm burden — say, just a couple of worms — the microfilariae may not be detected (this can also cause a false negative on the antigen test).

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).

Thus any calculation of GNP is false if it does not subtract the negative impact caused by these other factors.

False positive and negative results and over-diagnosis could cause psychological distress, delay treatment, or lead to overtreatment, according to the National Cancer Institute (NCI).

Dr Greene said: «Increasing scientific and public understanding of the causes of false memory is an important goal, particularly in light of some of the more negative consequences associated with the phenomenon, including faulty eyewitness accounts and the controversies surrounding false memories of traumatic childhood events.

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.

It's important to note that there's a 30 % chance that the antibody tests to diagnose Hashimoto's will present an indecisive or false negative result, causing many Hashimoto's cases to go undiagnosed for years.

The tests may come back incorrect with a false negative, and you won't have a proper understanding of what's causing your symptoms.

Errors during collecting, storing or testing urine samples may cause false positive or negative results [6].

It's important not to eliminate gluten from your diet before being tested as it would cause a false - negative test result.

Ellie, The breath tests are not always accurate so perhaps it was a false negative OR... interestingly, research has shown that even with adequate absorption of some FODMAPs they still elicit symptoms — so even if you digest it, the presence of the some FODMAPs in your intestine still draw water into your bowel and cause distress.

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.

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).

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.

Cognitive Behavior Therapy seeks to treat the root causes of CUD, challenging false or negative belief structures and replacing them with true and positive ones.