Our study of 677 cases of idiopathic sudden sensorineural hearing loss (ISSNHL) related to posttreatment recovery yielded the following results:
1) Most subjects—36.8%—had horizontal hearing loss
2) V character hearing loss curve was highest at 61.7% and lowest in high tone, near total deaf, and total deaf.
3) We classified 6 hearing loss types into 4 prognostic types—good for V character, intermediate for horizontal and reverse V, poor for high tone and near total deaf, extremely poor for total deaf.
4) Good recovery—a hearing level improvement of ≥30dB—was relatively high in near total deaf hearing loss.
5) Total deaf hearing loss had the highest vertigo at 68.4%.