Table 1.

American Academy of Otolaryngology Head and Neck Surgery definition of the certainty of diagnosis of Menière’s disease (see text).

Certain	Definite Menière's disease plus postmortem confirmation
Definite	Two or more episodes of vertigo* plus audiometrically confirmed sensorineural hearing loss; tinnitus or aural fullness plus other causes excluded
Probable	One episode of vertigo* plus audiometrically confirmed sensorineural hearing loss plus tinnitus or aural fullness; other causes excluded
Possible	Episodes of vertigo* with no hearing loss, or sensorineural hearing loss with dysequilibrium; other causes excluded

*Defined as spontaneous, rotational vertigo lasting more than 20 minutes.