82 results
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
Important Biostatistics ... = Rule IN #Biostatistics ... #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
Posterior chamber pathology comparison on Ocular POCUS:
- vitreous hemorrhage
- vitreous detachment
- retinal detachment

#Posterior #chamber #pathology #Ocular
chamber pathology comparison ... on Ocular POCUS ... pathology #Ocular #POCUS ... Detachment #Hemorrhage #Comparison
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Epidemiology and Biostatistics ... PPV: proportion ... prevalence is low, then PPV ... specificity -> higher PPV ... #Epidemiology #Biostatistics
What's in a Blood Gas? VBG vs ABG

BOTTOM LINE: VBG is less painful, more easily obtained
sensitivity & 100% NPV ... Differences #Versus #Comparison
PPI Potency for GERD - Mnemonic and Conversion
Pantoprazole is Lower than Omeprazole for Esophageal Reflux
Pantoprazole is
PPI Potency for ... Rabeprazole #PPI ... Mnemonic #Conversion #comparison
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
it has a narrow focus ... Calculation #Table #PPV ... #NPV #Formulas
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