| Dimensions | Questions | Targeted additional questions |
| S | SYMPTOMS | What are the symptoms? | Vertigo, dizziness, nausea, postural instability, falls without syncope, falls with syncope, lightheadedness, rotatory or linear sensations, tilt of the vertical, oscillopsia, drunken feeling, lateropulsion, to-and-fro rocking,.. |
| O | OFTEN | How often does “it” happen? | Daily (once or several times a day), weekly, monthly, irregularly, continuously, only once, only during the trigger |
| S | SINCE | Since when do you suffer from this problem? Both related to time and circumstances | A day, week, month, year, decade agoAfter a viral illness, a head trauma, a medical/surgical intervention, a journey on a boat, train or plane, without any clear cause |
| T | TRIGGER | What triggers the complaints/symptoms and what makes them worse, i.e., aggravating factors? | General head movements, walking, rolling over in bed, bending over, looking up, being a passenger in a car or plane, walking in supermarket aisles, walking in semi-darkness, coughing, noise, visual stimuli, or … completely spontaneous |
| O | OTOLOGY | Do you experience any concomitant otological symptoms and when do these occur? | Hearing loss (fluctuating), tinnitus, aural fullness, hyperacusis, autophonia, draining ear, otalgiaBefore, during, or after the attacks, in between, long-lasting, i.e., independent of the symptoms |
| N | NEUROLOGY | Do you experience any concomitant neurological symptoms? | Headache, migraine (current and in the past), face or limb paresthesia, scotoma, phonophobia, photophobia, numbness, palpitations, hyperventilation, speech problems, diplopia, cervical problems |
| E | EVOLUTION | What is the evolution of the symptoms? | Persistent, improving, worsening, ups, and downs |
| D | DURATION | What is the duration of the symptoms? | Seconds, minutes, hours, days, continuously |