246 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
"Imagine you're running airport security, screening passengers (tests) to catch dangerous items (diseases). Now meet your
and Specificity ... Sensitivity is your ... Specificity, on ... High specificity ... #sensitivity
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 ... #Specificity
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 ... #Specificity #Laboratory
(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%- ... 93%; Specificity ... 87%-100% False ... 3)-ß-d-glucan False
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 Positives ... 96% • Higher specificity ... BAL samples • False
Fungal Biomarkers: Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 • Pathogens:
dermatidis • Sensitivity ... & Specificity: ... breakthrough IFI in HM • False ... & Specificity ... recipients, CGD pts • False
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Sensitivity (rule ... Specificity (rule ... FN) Higher specificity ... null when it’s false ... when it is indeed false
Test Characteristics of Physical Exam, Imaging, and LRINEC 
Score for the Identification of Necrotizing Fasciitis (Sensitivity,
Necrotizing Fasciitis (Sensitivity ... , Specificity %) ... #PhysicalExam #Sensitivity ... #Specifiity #Diagnosis
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
/ (1 – Specificity ... ) / Specificity ... Sensitivity vs ... : - Sensitivity ... #specificity #PPV