Key Takeaways

Applying five published definitions for long COVID yielded a prevalence that ranged from 30.84% to 42.01% at 3 months and 14.23% to 21.94% at 6 months.

Up to a third of the variation in prevalence rates could be attributed to the differences in long COVID definitions.

While ideal, there may never be a single, standardized long COVID definition, given the divergent needs of researchers and clinicians.

Using the various published definitions of long COVID delivered a wide range of estimated prevalence rates, according to a prospective cohort study.

Among over 4,500 participants in the longitudinal Innovative Support for Patients With SARS-CoV-2 Infections Registry (INSPIRE), applying five published definitions for long COVID yielded a prevalence that ranged from 30.84% to

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