FMB-2021-0285 Supplementary material

Table S1. Pre-existing conditions before COVID-19 infection (multiple choices and free text allowed). Conditions found only in 1 Long-COVID child were grouped into Other

Table S2. Symptoms present since COVID-19 infection (multiple choices allowed), by confirmation status of COVID-19 infection.

Table S3. Changes reported since COVID infection, by confirmation status of COVID-19 infection, and by the pre-existence of comorbidity conditions

Table S4. Number of changes since COVID-19 infection, by confirmation status of infection, and by the pre-existence of comorbidity conditions

Table S5. Activity level before infection by Participation in Any level of activity in the first 6 weeks of COVID-19 infection

Table S6. Child’s current activity level by Activity level before infection

Table S7. Mental health / cognitive issues since COVID-19 infection (multiple issues per child are usual), by confirmation status of infection, and by the pre-existence of comorbidity conditions

Table S8. Number of mental health / cognitive issues since COVID-19 infection (from those in Table 5, excluding “None of the above” and “Other”), by confirmation status of infection, and by the pre-existence of comorbidity conditions

Supplemental Figure S1. Social media traffic of the Long Covid Kids UK platform.