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. 2022 Mar 21;11(1):e001698. doi: 10.1136/bmjoq-2021-001698

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© 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.

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/.

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A statistical process control P chart showing successful outpatient TJA as a percentage of all TJAs performed. All elective procedures were suspended during weeks 31–37 due to the third wave of COVID-19 in Ontario. Created by authors. TJA, total joint arthroplasty. UCL (upper control limit); CL (control limit)