7 results
To improve the usefulness of the serum creatinine concentration as a marker of kidney function, prediction
predict GFR, these formulas ... commonly used formulas ... assistant medical calculation ... Neither formula ... #Calculation #Formulas
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Specificity Calculation - Probability that a test correctly identifies those without the disease (true negative rate)

Specificity
Specificity Calculation ... negative rate) Specificity ... TN / (FP + TN) Specificity ... #Epidemiology #Equations ... #calculations #
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
and Epidemiology Equations ... disease present Specificity ... Sensitivity) / Specificity ... #Epidemiology #Equations ... #calculations #
Table 1. Equations for estimated glomerular filtration rate (eGFR) in adults based on serum creatinine concentration*.
#Diagnosis
Equations for estimated ... CockcroftGault #EGFR #Equations ... #Calculation #Formulas
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
Specificity is the ... #Sensitivity #Specificity ... NegativePredictiveValue #Calculation ... Table #PPV #NPV #Formulas
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QT/QTc- Interval
•	Start of Q-wave to end of the T-wave (time of ventricular depolarization + repolarization).
•	Life threatening
R-R interval (Works ... Methods of calculating ... QTc: • Bazett formula ... • Fridericia formula ... • Rautaharju formula
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Specificity (rule ... FN) Higher specificity ... Biostatistics #formulas ... #calculations #