The evolution of hearing
During the first years of the disease, the greatest degree of hearing loss coincides with a higher prevalence of vertigo episodes (1), even though these subsequently diminish or disappear while hearing loss persists (21,22). In this regard, our results show that patients within model number one, who suffer from vertigo episodes for a shorter time, experience less hearing loss. This could be explained by the fact that, experiencing episodes of vertigo for a shorter period of time is associated with better preservation of hearing. However, model number two presented greater mean hearing loss than those in model number three, which is that in which there was a worse severity in the temporal evolution of vertigo episodes.