22 results
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
#Specificity #PositivePredictiveValue ... Calculation #Table #PPV ... #NPV #Formulas ... #Statistics #Matrix
Positive Predictive Value Calculation - Probability that someone with a positive test actually has the disease

Positive
Positives #PositivePredictiveValue ... #PPV #Biostatistics ... #statistics #Epidemiology
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
Biostatistics #statistics ... #specificity #PPV ... #NPV
Fungal Biomarkers: Comparing Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 •
Spec -80% for IA, PPV ... < 50%, NPV > 90% ... Galactomannan #diagnosis #comparison
Differentiating Pacemaker vs ICD on Chest XRay
 - Single Chamber PPM
 - Single Chamber ICD
 -
Single Chamber PPM ... CXR #Radiology #comparison
What's in a Blood Gas? VBG vs ABG

BOTTOM LINE: VBG is less painful, more easily obtained
sensitivity & 100% NPV ... Differences #Versus #Comparison
Characteristics of Peripheral and Central Vertigo
PERIPHERAL VERTIGO
 • Onset: Sudden
 • Intensity: Severe initially, often decreasing
than a minute for BPPV ... posterior canal BPPV ... horizontal canal BPPV ... Induces vertigo (BPPV ... signs #symptoms #comparison
HINTS Exam - Distinguishing Central from Peripheral Vertigo
 • Head Impulse: Head thrust 10° with eyes
diagnosis #neurology #bppv ... #comparison #table
Peripheral Vertigo
Time course and symptoms characteristics are very helpful in distinguishing between causes of peripheral vertigo.
Benign
Positional Vertigo (BPPV ... differential #diagnosis #comparison
Differentiating Benign Paroxysmal Positional Vertigo (BPPV) From Vestibular Neuritis-Labyrinthitis
BENIGN PAROXYSMAL POSITIONAL VERTIGO
 • Age: More common
Positional Vertigo (BPPV ... consistent with BPPV ... ) #Vertigo #BPPV ... diagnosis #neurology #comparison