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New information following the change in COVID-19 alert levels. massey.ac.nz/coronavirus
The Massey University EpiCentre have developed Adobe Flash applications to make the job of teaching epidemiology a little bit easier.
The links below will open each application up in a new window. Alternatively, to run the tools on your own computer off line, zip files with the component files are provided. Two files are required to be in the same folder: *.SWF and *.XML. Once unzipped, double click on the *.SWF file. The application should open in your default web browser. If you want to add an additional language simply edit the XML file as you see fit.
You will need to download Adobe Flash Player to view these applications.
Summary measures from a 2 by 2 table. A 'classic' 2 by 2 table. After entering cell frequencies risk ratio, odds ratio, attributable risk, attributable fraction, population attributable risk and population attributable fraction are returned (along with their 95% confidence intervals).
Click on the help buttons to get an interactive explanation of (tricky) things like population attributable risk and population attributable fraction.
Explanation of the relationship between incidence and prevalence.
water5.swf (175 KB)
Programming: Thanh Hoa Nguyen and Sean Macintyre.
Design: Mark Stevenson and Daan Vink.
Summary measures from a 2 by 2 table. Again, a 'classic' 2 by 2 table. After entering cell frequencies for diagnostic test data apparent and true prevalence, sensitivity and specificity, and positive and negative predictive values are returned (along with their 95% confidence intervals).
The electric nomogram. After entering the estimated pre-test probability of disease and test characteristics (as either test sensitivity and specificity or as a likelihood ratio) the post-test probability of disease is returned.
Understanding sensitivity and specificity using the right side of the brain. This is an interactive version of material presented in the following article: Loong T-W (2003) Understanding sensitivity and specificity with the right side of the brain. British Medical Journal, 3327, 716 - 720.
We welcome any feedback (and suggestions). Please get in touch.
Page authorised by Professor Cord Heuer
Last updated on Monday 06 February 2017