22 results
Important Biostatistics and Epidemiology Equations

Sensitivity = TP / (TP + FN) = true positives / disease
Biostatistics #statistics ... #specificity #PPV ... #NPV
Sensitivity is the proportion of truly diseased persons in the screened population who are identified as
the screening test ... the screening test ... Calculation #Table #PPV ... #NPV #Formulas ... #Statistics #Matrix
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Pap Smear Algorithm 
#Diagnosis #Pap #Smear #Test #Cervical #HPV #Screening #PrimaryCare #Management #Vaccination #Gynecology
Pap Smear Algorithm ... Diagnosis #Pap #Smear #Test ... #Cervical #HPV
IDSA Recommendations for Preventing Human Papillomavirus Infections and Cervical Cancer Screening for Women with in HIV-AIDS
Recommendations
• Pap test should ... and HPV test) is ... First Episode of HPV ... Schedules • HPV ... and 6 months #HPV
Negative Predictive Value Calculation - Probability that someone with a negative test truly does not have
with a negative test ... NegativePredictiveValue #NPV ... Biostatistics #statistics
Positive Predictive Value Calculation - Probability that someone with a positive test actually has the disease

Positive
with a positive test ... PositivePredictiveValue #PPV ... Biostatistics #statistics
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
PPV: proportion ... prevalence is low, then PPV ... NPV: proportion ... specificity -> higher PPV ... sensitivity -> higher NPV
Genital Ulcer - Differential Algorithm
Painful
 - H. ducreyi (Chancroid)
 - HSV
Painless
 - T pallidum (Chancre)
 -
- Differential Algorithm ... Chlaymydia - HPV ... #Differential #Algorithm
Arterial Lines & Waveforms
Arterial lines permit continuous invasive blood pressure measurement, frequent arterial blood sampling, and
SQUARE WAVE TEST ... PRESSURE VARIATION (PPV ... Pressure Variation (PPV ... volume (increased PPV
Oral Cavity Lesions in a patient with HIV/AIDS
White plaque
 - Pseudo-membranous candidiasis
 - Oral hairy leukoplakia
Mass - Wart (HPV ... Differential #Diagnosis #Algorithm