Discriminant Analysis of the Prognostic Factors for Hearing Outcomes in Patients with Idiopathic Sudden Sensorineural Hearing Loss

BACKGROUND: This study aims to determine and assess prognostic variables that might affect the hearing result in patients with idiopathic sudden sensorineural hearing loss following intratympanic steroid injection. METHODS: In total, 190 patients with idiopathic sudden sensorineural hearing loss received intratympanic steroid injection. Two hearing indices (recovery and nonrecovery) will be analyzed as dependent variables; patient's age, time period between the onset of hearing loss and treatment, initial level of hearing (hearing loss pre), type of audiogram curve (upsloping, downsloping, and flat), presence of vertigo, presence of tinnitus, and diabetes) will be analyzed as prognostic factor variables. RESULTS: Recovery was seen in 72% of the patients. Different preinjection audiogram curves and hearing grades had a significant effect on recovery, absence of vestibular symptoms and no diabetic history were noted to have a good prognosis. Delay in treatment by more than 30 days from the onset of hearing loss was associated with a worse prognosis. CONCLUSION: Idiopathic sudden sensorineural hearing loss associated with late treatment plan more than 1 month, presence of vertigo, diabetes, and profound prehearing loss were negative prognostic factors. Whereas age, gender, and presence of tinnitus did not affect prognosis. More stable response was obtained when intratympanic steroids were added within 1 month after diagnosis, and the patient presented with mild or moderate hearing loss grade, flat or downsloping pure tone audiometery curve, and absence of vertigo and nondiabetic with significantly good results.