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The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present. The false positive rate is equal to the significance level. The specificity of the test is equal to 1 minus the false positive rate.
The rapid plasma reagin test (RPR test or RPR titer) is a type of rapid diagnostic test that looks for non-specific antibodies in the blood of the patient that may indicate an infection by syphilis or related non-venereal treponematoses. It is one of several nontreponemal tests for syphilis (along with the Wassermann test and the VDRL test).
Centers for Disease Control and Prevention (CDC)-approved standard tests include the VDRL test (a slide test), the rapid plasma reagin (RPR) test (a card test), the unheated serum reagin (USR) test, and the toluidine red unheated serum test (TRUST). [2] These have mostly replaced the first nontreponemal test, the Wassermann test. [citation needed]
Top-Line Data Show Exact Sciences' Cologuard Test Demonstrates 92 Percent Sensitivity in the Detection of Colorectal Cancer All endpoints achieved in 10,000-patient trial of non-invasive ...
False negative tests can occur and the general expectation for antigen tests is an 80% accurate detection rate for infection, says David Cennimo, M.D., infectious disease expert and associate ...
The company reported $1.43 billion in revenue last year from its screening business, primarily from sales of its colon cancer test Cologuard, which was approved by the FDA in 2014.
Since the antibodies do not bridge between antigens, no agglutination occurs. Because no agglutination occurs, the test is interpreted as negative. In this case, the result is a false negative. The range of relatively high antibody concentrations within which no reaction occurs is called the prozone. [5]
Exact Sciences (EXAS) has pre-announced first quarter results, with total revenue up 114% year-over-year at $348 million, surpassing the Street estimate of $342.6 million.The company, which ...