[Regression analysis of recovery from idiopathic sudden hearing loss].

Probability of recovery from idiopathic sudden hearing loss depends on many factors. The "recovery rate" as an indicator of recovery from s udden hearing loss was proposed. Using the recovery rate, data from 183 cases of idiopathic sudden hearing loss by means of multiple regression analysis was examined. 1) The recovery rate as a percentage of the hearing recovery to the difference of the initial hearing level in both ears was defined. 2) The recovery rate was impaired by advanced age, late visit after onset, presence of vertigo, severer hearing loss, and audiogram type of high-frequency hearing loss. 3) The value of the partial regression coefficient was largest in the factor of "presense of vertigo". However, it was thought that the effect of vertigo is not too large, because of its high correlation with the severity of the initial hearing loss. 4) The recovery rate might be predicted at about 26% with the patient's age, time to the initial visit, the severity of the initial hearing loss, and the difference between low-and high-frequency hearing level by multiple regression analysis.