Negative Predictive Value

In statistics and diagnostic testing, the negative predictive value (NPV) is a summary statistic used to describe the performance of a diagnostic testing procedure. It is defined as the proportion of subjects with a negative test result who are correctly diagnosed. A high NPV for a given test means that when the test yields a negative result, it is most likely correct in its assessment. In the familiar context of medical testing, a high NPV means that the test only rarely misclassifies a sick person as being healthy. Note that this says nothing about the tendency of the test to mistakenly classify a healthy person as being sick.

Read more about Negative Predictive Value:  Definition, Worked Example, Relation To Negative Post-test Probability

Other articles related to "negative, negative predictive value":

William Ernest Hocking - Negative Pragmatism
... Hocking's most important contribution to philosophy is "negative pragmatism," which means that what "works" pragmatically might or might not be true, but what does not work ... of the other criteria of truth they present, but they do not denigrate negative pragmatism ... an inadequacy in any criterion is to invoke negative pragmatism ...
Friedrichs Extension - Examples
... Multiplication by a non-negative function on an L2 space is a non-negative self-adjoint operator ... in symbols If for each x ∈ U the n × n matrix is non-negative semi-definite, then T is a non-negative operator ... are elliptic although in general elliptic operators may not be non-negative ...
... opinions and use of words with strong positive or negative connotations (e.g ... terrorist as negative and freedom fighter as positive) ... A similar idiom is "all things to all people", which is often used as a negative term in politics ...
Negative Predictive Value - Relation To Negative Post-test Probability
... Although sometimes used synonymously, a negative predictive value generally refers to what is established by control groups, while a negative post-test probability rather refers to a ... as the prevalence in the control group used to establish the negative predictive value, then the two are numerically equal ...
Negative - Other Uses
... Negative sign, the passive or feminine signs of the zodiac in astrology Negative space, in art, the space around or between elements of the subject ...

Famous quotes containing the word negative:

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