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Sensitivity Specificity False-Positive False-Negative Contingency Table / confusion matrix

Sensitivity refers to the test's ability to correctly
Sensitivity Specificity ... False-Positive ... False-Negative Contingency ... confusion matrix Sensitivity ... #FalsePositive
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Galactomannan Testing Sensitivity ... Specificity and False ... BAL samples • False ... mold-active AF • False ... Fungal #Testing #FalsePositives
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Contributing to False ... (High Rate of False ... NSAlDs resulting in false-positive ... not result in false ... #FalsePositives
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
that may cause false ... Toxicology #Diagnosis #FalsePositive
The test characteristics of the heterophile antibody (AKA the monospot test) are not perfect and can
can lead to both false ... positive and false ... Serologies #Titers #Sensitivity
Commonly Used Diagnostic Tests for Celiac Disease

Tissue transglutaminase (tTG) IgA antibodies
 - Most reliable noninvasive test
test - High sensitivity ... specificity - Falsely ... Widely variable sensitivity ... antibodies - Sensitivity
Causes of False-Positive and False-Negative IGRA and TST Results

#Diagnosis #TB #Tuberculosis #Tuberculin #SkinTest #TSTs #IGRA #FalseNegatives
Causes of False-Positive ... and False-Negative ... FalseNegatives #FalsePositives
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
evaluation • False ... cauliflower, ETOH • False ... #FOBT #Guaiac #FalsePositives
1,3 Beta-D-Glucan and Galactomannan - Pathogens, and Testing Characteristics
1,3 ß-D-glucan:
 • Most fungi excluding mucor and
and pneumocystis False ... other fungi • False ... Characteristics #Sensitivity
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
Epidemiology Equations Sensitivity ... Likelihood Ratio = Sensitivity ... Specificity Sensitivity ... Mnemonic: - Sensitivity ... diagnosis #mnemonic #sensitivity