false-negative ratio

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false-negative ratio



The ratio of subjects affected by an illness whose test results wrongly suggest they are disease-free to all those subjects who have the disease. The false-negative ratio of a test is useful in determining the test's reliability (i.e., the higher the ratio, the less reliable the test).

A high FNR may be biological or analytical in origin. Biological false-negative test results may occur when a test is performed at the wrong stage of an illness (e.g., before an antibody or antigen is found in the blood). Analytical false negatives may result when a test lacks adequate sensitivity or specificity to detect an agent that is already present.

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References in periodicals archive ?
The segmentation results for the entire image dataset achieved with GVFRM [17], C2G2F [18], DGF [19], and the proposed method were evaluated by ME, FPR, FNR, and KI.
Following the interaction, the FNR members interacted with various organizations including students, scholars and elders of the community here at Nagaland House.
Measures Equations ACC (TP + TN)/(TP + FP + TN + FN) PR TP/(TP + FP) RR TP/(TP + FN) F-Measure (2 * PR * RR)/(PR + RR) FPR FP/(TN + FP) FNR FN/(FN + TP) FAR (FPR + FNR)/2 Table 2: The performance of different feature reduction algorithms.
To reliably assess the model performance, the model construction and verification phases have been repeated 20 times to obtain the measurement indices of CAR, AUC, TPR, FPR, FNR, TNR, precision, and recall.
Diaphorase activity of FNR with DCPIP as an electron acceptor (Scheme 1) was measured as reported by Onda [21] with modification in the reaction mixture of 50 mM Tris-HCl (pH 7.5), 1 mM Mg[Cl.sub.2], 0.2 mM DCPIP, and 5 nM FNR.
Figures 4 and 5 and Tables A10 and A11 also showed that the gs method had a lower FPR than the 10 probe-wise tests, but had higher FNR than these 10 probe-wise tests.
Furthermore, FNR considers a problem to system security, and then, it computes the number of bot records classified as normal; thus, the constructor or designer attempts to reduce or eliminate this value every time.
where false positive rate (FPR) denotes the percentage of incorrectly identified normal flight data and false negative rate (FNR) denotes the percentage of incorrectly identified abnormal flight data
We have examined the nerve volume (NV), fascicle volume (FV), epineurial volume (EV), fascicles to nerve volume ratio (FNR), and nerve cross-sectional areas (CSA), comparing a population of subjects affected by DPN with a group of sex/age matched healthy volunteers.