Correction: Primer on binary logistic regression ================================================ Harris JK. Primer on binary logistic regression. *Fam Med Com Health* 2021;9:e001290. doi: 10.1136/fmch-2021-001290 Equation 3 was captured incorrectly. The denominator should have been ‘1−probability’ and not ‘1+probability’. The online HTML and PDF have been updated accordingly. * © Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. [http://creativecommons.org/licenses/by-nc/4.0/](http://creativecommons.org/licenses/by-nc/4.0/) This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: [http://creativecommons.org/licenses/by-nc/4.0/](http://creativecommons.org/licenses/by-nc/4.0/).