Units: US SI

Bayesian Sensitivity, Specificity, Probabilities

Pre-Test Probability
Prevalence (0-100%) %
Sensitivity (0-100%) %
Specificity (0-100%) %
Post-Test Probability %
Positive Predictive Value %
Negative Predictive Value %
Positive Likelihood Ratio
Negative Likelihood Ratio

Post-Test Odds: Convert Pre-Test Probability -> Pre-Test Odds, then Pre-Test Odds * LR

  • Sensitivity = TP / (TP + FN)
  • Specificity = TN / (FP + TN)
  • Prevalence = (TP + FN) / (TP + TN + FP + FN)
  • PPV (Positive Predictive Value) = TP / (TP + FP)
  • NPV (Negative Predictive Value) = TN / (FN + TN)
  • Positive Likelihood Ratio= SENS / ( 1-SPEC )
  • Negative Likelihood Ratio=( 1-SENS ) / SPEC

Posted in: General

Equations

Scores