Figure.

Overview of the COS development process

For the Delphi survey, all outcomes from the first round were included in the second round. COMET=Core Outcome Measures in Effectiveness Trials. COS=core outcome set. *Outcomes were classified using COMET taxonomy.¹³ †Outcomes were classified into survival, physiological or clinical, life impact, and resource use outcomes. ‡Participants were classified into three stakeholder groups: people with post-COVID-19 condition and family members or caregivers, health-care professionals and researchers with post-COVID-19 condition, and health-care professionals and researchers without post-COVID-19 condition. §Participants were classified into two stakeholder groups: people with post-COVID-19 condition and family members or caregivers, and health-care professionals and researchers without post-COVID-19 condition. ¶Additional outcome was part of a previously published COS for COVID-19.¹⁴