252 results
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 ... #Sensitivity #Specificity
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
"Imagine you're running airport security, screening passengers (tests) to catch dangerous items (diseases). Now meet your
two star agents: Sensitivity ... Sensitivity is your ... test has high sensitivity ... short: High sensitivity ... #specificity #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
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
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 ... invasive dz • Sensitivity ... mold-active AF • False
Fungal Biomarkers: Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 • Pathogens:
dermatidis • Sensitivity ... breakthrough IFI in HM • False ... : Mucorales • Sensitivity ... disease - Sensitivity ... recipients, CGD pts • False
(1,3)-β-d-glucan
Abundant cell wall polysaccharide, found in most fungi, except cryptococci, zygomycetes (mucor, rhizophus) and blastomyces.
Sensitivity 64%-93%;
Sensitivity 64%- ... Specificity 87%-100% False ... 3)-ß-d-glucan False
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Sensitivity (rule ... PPV Higher sensitivity ... null when it’s false ... when it is indeed false
Additional Modalities for Workup of GI Bleed (Other than EGD + Colonoscopy)

Pill endoscopy
 • Able to
endoscopy limits, high sensitivity ... Noninvasive • False