Table 2

Calculation of the diagnostic scores for PPV, BPPV, MD, and VM.

Question - Item/answer

PPV

BPPV

MD

VM


How does your vertigo occur?

in attacks

0

3.77

as persistent vertigo

2.22

-2.35

-1.79

as persistent vertigo with attacks

1.65


What kind of your vertigo do you have?

rotational vertigo

-1.481

1.551

unsteadiness

-3.26

feeling of being in a lift

1.79

-3.06

lightheadedness

-2.54


How do you perceive the environment during vertigo?

like on a roundabout

-1.481

1.551

like on a boat

blurred

-3.42

-3.74


How often do you have defective hearing?

never

occasionally

-1.142

frequently

-1.142

always

-1.142


How often do you have ear noises?

never

occasionally

-1.142

frequently

-1.142

always

-3.03

5.42

-1.142


How often do you have sweating/nausea/vomiting?

never

0 = 0 · 0.98

occasionally

0.98 = 1 · 0.98

frequently

-1.211

1.95 = 2 · 0.98

2.82

always

-1.211

2.93 = 3 · 0.98


How often do you have drop seizures?

never

occasionally

frequently

1.70

-2.952

always

-2.952


For answers marked in the questionnaire, the corresponding numbers are added up. Items marked with the same superscript number within one diagnosis are scored only once. E. g. the score for PPV of a patient reporting „rotational vertigo“ or „perception of the environment like on a roundabout“ (both marked by 1) will be diminished by 1.48 no matter whether this patient reports both or only one of these two symptoms. Patients are allowed to check only one answer per question, except for the 2nd and 3rd question.

Examples of calculated scores can be found in the Additional file 1

Bayer et al. BMC Neurology 2010 10:98   doi:10.1186/1471-2377-10-98

Open Data