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  2. Positive and negative predictive values - Wikipedia

    en.wikipedia.org/wiki/Positive_and_negative...

    The positive predictive value (PPV), or precision, is defined as = + = where a "true positive" is the event that the test makes a positive prediction, and the subject has a positive result under the gold standard, and a "false positive" is the event that the test makes a positive prediction, and the subject has a negative result under the gold standard.

  3. Mantoux test - Wikipedia

    en.wikipedia.org/wiki/Mantoux_test

    Mantoux test injection site in a subject without chronic conditions or in a high-risk group clinically diagnosed as negative at 50 hours Tuberculin is a glycerol extract of the tubercle bacillus . Purified protein derivative (PPD) tuberculin is a precipitate of species-nonspecific molecules obtained from filtrates of sterilized, concentrated ...

  4. Template:Graph:Chart/testcases - Wikipedia

    en.wikipedia.org/wiki/Template:Graph:Chart/testcases

    This is the template test cases page for the sandbox of Template:Graph:Chart Purge this page to update the examples. If there are many examples of a complicated template, later ones may break due to limits in MediaWiki ; see the HTML comment " NewPP limit report " in the rendered page.

  5. Template:DiagnosticTesting Diagram - Wikipedia

    en.wikipedia.org/wiki/Template:DiagnosticTesting...

    False positive rate (FPR), Fall-out, probability of false alarm = ⁠ Σ False positive / Σ Condition negativePositive likelihood ratio (LR+) = ⁠ TPR / FPR ⁠ Diagnostic odds ratio (DOR) = ⁠ LR+ / LR− ⁠ Matthews correlation coefficient (MCC) = √ TPR·TNR·PPV·NPV − √ FNR·FPR·FOR·FDR

  6. Tine test - Wikipedia

    en.wikipedia.org/wiki/Tine_test

    The test is then read 48 to 72 hours later by measuring the size of the largest papule or induration. Indications are usually classified as positive, negative, or doubtful. [2] Because it is not possible to control precisely the amount of tuberculin used in the tine test, a positive test should be verified using the Mantoux test. [3]

  7. Template:Graph:Chart - Wikipedia

    en.wikipedia.org/wiki/Template:Graph:Chart

    A logarithmic chart allows only positive values to be plotted. A square root scale chart cannot show negative values. x: the x-values as a comma-separated list, for dates and time see remark in xType and yType; y or y1, y2, …: the y-values for one or several data series, respectively. For pie charts y2 denotes the radius of the corresponding ...

  8. Diagnosis of tuberculosis - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_of_tuberculosis

    Injecting a Mantoux skin test The Mantoux test for TB involves intradermally injecting PPD (Purified Protein Derivative) tuberculin and measuring the size of induration 48-72 hours later. The Mantoux skin test is used in the United States and is endorsed by the American Thoracic Society and Centers for Disease Control and Prevention .

  9. False positives and false negatives - Wikipedia

    en.wikipedia.org/wiki/False_positives_and_false...

    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.