98 results
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Sensitivity (rule ... PPV Higher sensitivity ... error Validity (“accuracy ... null when it’s false ... when it is indeed false
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
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
that Can Cause False ... Amphetamine false ... Cannabinoid false ... Benzodiazepine false ... Barbiturates false
Kernig's and Brudzinski's Signs- Physical Exam Diagnostic Accuracy in Meningitis

#Diagnosis #PhysicalExam #Meningitis #Sensitivity #Accuracy #Kernigs #Brudzinskis
Exam Diagnostic Accuracy ... PhysicalExam #Meningitis #Sensitivity ... #Accuracy #Kernigs
Causes of False Elevation and Reduction in HbA1c

== False Elevation ==
Decreased RBC turnover 
• Iron, B-12,
Causes of False ... in HbA1c == False ... Transfusions == False ... Transfusions #False
Ascites: Physical Exam Diagnostic Accuracy

Sensitivity and Specificity: Shifting Dullness, Bulging Flanks. Fluid Wave 

Source: Joseph D.
Exam Diagnostic Accuracy ... Sensitivity and ... PhysicalExam #Ascites #Accuracy ... #Testing #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
Urinalysis Testing - UTI Sensitivity and Specificity
 - Leukocyte esterase 
 - Nitrite 
 - WBCs
Testing - UTI Sensitivity ... Urinalysis #Testing #Accuracy ... #Sensitivity #Specificity
Test Characteristics of Physical Exam, Imaging, and LRINEC 
Score for the Identification of Necrotizing Fasciitis (Sensitivity,
Necrotizing Fasciitis (Sensitivity ... LRINEC #Testing #Accuracy ... #PhysicalExam #Sensitivity