Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.
Boers M. Designing effective graphs to get your message across. Ann of Rheum Dis 2018;77:833–9. doi:10.1136/annrheumdis-2018-213396
On page 835 of the article the ‘null zone’ is introduced, a way to graphically express statistical tests of differences between groups, and in Online appendix 4 a spreadsheet is offered to help calculate the necessary numbers. Unfortunately, this spreadsheet contained an error and has been replaced. Appendix 4 now contains the corrected version.