Teaching Pack

Using Test Information I, Part 3

An educational product of

All materials produced by the Center for Health Decision Science are free and publicly accessible for educational use

These companion slides accompany the videos included in the teaching pack on Using Test Information I, in which students review the four conditional probabilities describing the performance of a dichotomous test, review the relationship between sensitivity and specificity, calculate likelihood ratios to describe test performance, and conduct probability revision using the odds-LR form of Bayes.

This teaching pack was developed by Sue J. Goldie at the Center for Health Decision Science at the Harvard T.H. Chan School of Public Health. The multimedia components were developed as part of a series of pilots while constructing an online course for graduate students in public health.

Citation: Companion Slides. Teaching Pack: Probability Revision and Bayes. Center for Health Decision Science, Harvard T.H. Chan School of Public Health 2017. http://repository.chds.hsph.harvard.edu/repository/collection/10/

Using Test Information I

Upon completion of this teaching pack students should be able to:

1. Calculate four conditional probabilities describing the performance of a dichotomous test, and explain the relationship between the TPR (sensitivity), FNR, TNR (specificity), and FPR.

2. Define a likelihood ratio (LR), calculate & interpret LR for positive result (LR+) and for negative result (LR-).

3. Convert odds to probabilities (and vice versa) & conduct probability revision using the odds-LR form of Bayes.

Using Test Information I: Objectives

Companion Slides. Teaching Pack: Using Test Information I. Center for Health Decision Science, Harvard T.H. Chan School of Public Health 2017http://repository.chds.hsph.harvard.edu

Videos: Using Test Information I, Part 3: Practice using the odds-LR form of Bayes

• Video 3.1 Practice using odds-LR form of Bayes (~21 min)

Video Outline

Companion Slides. Teaching Pack: Using Test Information I. Center for Health Decision Science, Harvard T.H. Chan School of Public Health 2017http://repository.chds.hsph.harvard.edu

Video 3.1

Practice Using the Odds-LR form of Bayeswith

Sue J. Goldie

Video 3.1 Practice using odds-LR form of Bayes

Companion Slides. Teaching Pack: Using Test Information I. Center for Health Decision Science, Harvard T.H. Chan School of Public Health 2017http://repository.chds.hsph.harvard.edu

Video 3.1 Practice using odds-LR form of Bayes

Companion Slides. Teaching Pack: Using Test Information I. Center for Health Decision Science, Harvard T.H. Chan School of Public Health 2017http://repository.chds.hsph.harvard.edu

Video 3.1 Practice using odds-LR form of Bayes

Companion Slides. Teaching Pack: Using Test Information I. Center for Health Decision Science, Harvard T.H. Chan School of Public Health 2017http://repository.chds.hsph.harvard.edu

Created by the Center for Health Decision ScienceHarvard T.H. Chan School of Public Health

All materials produced by the Center for Health Decision Science are free and publicly accessible for educational use

chds.hsph.harvard.edu