Health topics
… Understanding Lab Test Results … information site. What does a positive or negative result mean? Lab test results may be … to be a sign of an infection. What are false-positive and false-negative test results? …
Health topics
… Cancer Screening: Should I Have a PSA Test? … What are the risks of having a PSA test? False-positive results Often the PSA test can … tests can also cause a lot of worry. False-negative results PSA tests may miss some …
Medical tests
… Lyme Disease Test … Test Overview A Lyme disease test detects … bacteria that causes Lyme disease. A normal (negative) test means that no Lyme disease … but it does not show up on the test ( false-negative ). This is more likely with the …
Medical tests
… Human Immunodeficiency Virus (HIV) Test … to confirm the diagnosis. If ELISA is negative, other tests usually aren't needed. … This test has a low chance of having a false result after the first few weeks that a …
Medical tests
… Fetal Fibronectin Test … has symptoms of preterm labour. If the test is negative, you probably aren't having preterm … result may show that labour has started. But false-positive results are common. They can …
Medical tests
… Breast Cancer (BRCA) Gene Test … thinking about having a BRCA gene test. A negative BRCA result does not guarantee that … Other risks A negative test may give you a false sense of security. So you may not have …
Health topics
… facts Your options Have a blood or saliva test for HIV. Do not have the test. If you … you have been exposed to HIV but you test negative for it, you should be tested again. If … With an ELISA test, you could have a false-positive test result, which shows that …
Health topics
… the facts Your options Have a blood or urine test or some other test to screen for sexually … of your sex partners. You could have a false-positive test result, which shows that … For syphilis, you could have a false-negative result, which shows that you don't …
Medical tests
… Nuchal Translucency Screening Test … doesn't have the problem. This is called a false-positive test result. And it's also … when he or she does. This is called a false-negative test result. Related Information Birth …
Health topics
… can cause harm. Harm can come from: The test itself. An abnormal result that is not correct (a false-positive ). This can cause unneeded worry … normal result that is not correct ( a false-negative ). This can cause you to take no …
