17 results
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
disease present Specificity ... Sensitivity) / Specificity ... Sensitivity vs Specificity ... Biostatistics #statistics ... #PPV #NPV
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
Specificity is the ... #Sensitivity #Specificity ... Calculation #Table #PPV ... #NPV #Formulas ... #Statistics #Matrix
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It's eye-opening to realize how many tests with reasonable-appearing sensitivity or specificity will end up being
sensitivity or specificity ... despite having a specificity ... #Diagnosis #Statistics ... #Sensitivity #Specificity ... #Graph
Specificity Calculation - Probability that a test correctly identifies those without the disease (true negative rate)

Specificity
Specificity Calculation ... Probability that a test ... negative rate) Specificity ... TN / (FP + TN) Specificity ... Biostatistics #statistics
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Specificity (rule ... PPV: proportion ... prevalence is low, then PPV ... FN) Higher specificity ... -> higher PPV
Pap Smear Algorithm 
#Diagnosis #Pap #Smear #Test #Cervical #HPV #Screening #PrimaryCare #Management #Vaccination #Gynecology
Pap Smear Algorithm ... Diagnosis #Pap #Smear #Test ... #Cervical #HPV
This requires defining some general cutoff values for likelihood ratios.  These are admittedly arbitrary, but
between sensitivity/specificity ... #Diagnosis #Statistics ... #Sensitivity #Specificity ... #Relationship #Graph
Diagnosis Adrenal Insufficiency - Algorithm

Step 1) Screening Test: 6-8AM Cortisol Level
 - Early morning cortisol levels
Insufficiency - Algorithm ... Step 1) Screening Test ... have almost 100% specificity ... ) Confirmation Test ... Insufficiency #Algorithm
Positive Predictive Value Calculation - Probability that someone with a positive test actually has the disease

Positive
with a positive test ... PositivePredictiveValue #PPV ... Biostatistics #statistics
Deprescribing algorithm for proton pump inhibitors

To support clinicians in employing the recommendations outlined in the guideline,
Deprescribing algorithm ... deprescribing algorithm ... This algorithm helps ... longer be the best ... Management #Geriatrics #PPI