Correction
==========


The Bayes nomogram that appeared in the glossary of *Evidence-Based Medicine* in the [Jul/Aug](http://ebm.bmj.com/lookup/volpage/4/128-a), [Sep/Oct](http://ebm.bmj.com/lookup/volpage/4/160-a), and [Nov/Dec](http://ebm.bmj.com/lookup/volpage/4/192-a) 1999 issues should not be used because it contains 2 errors:

*   The likelihood ratio scale is imperfectly drawn giving inaccurate readings in parts of the nomogram

*   The lower 500 on the likelihood ratio scale should be 200

A correct version of the nomogram can be viewed on *Best Evidence.*