Table 1.

Online questionnaire

Part 1: Equilibrium disorders (vertigo/dizziness)

Have you ever experienced vertigo/dizziness before COVID-19 diagnosis? (yes/no)

Have you started experiencing dizziness or vertigo after diagnosis of COVID-19? (yes/no)

If YES, please describe the characteristics of your symptoms (violent vertigo attacks/chronic dizziness/instability)

Indicate the severity of your vertigo/dizziness (0–10)

Part 2: Tinnitus

Have you ever experienced tinnitus before COVID-19 diagnosis? (yes/no)

Have you started experiencing tinnitus after diagnosis of COVID-19? (yes/no)

If yes, please specify the characteristics of your tinnitus (occasional/continuous floating/persistent/pulsatile/continuous)

Indicate the severity of your tinnitus (0–10)

Part 3: Migraine

Do you suffer from migraine? (yes/no)