목적: We conducted a retrospective study of sudden sensorineural hearing loss(SSNHL) patients to compare presence of vertigo symptom and vestibular function test results (Caloric test, C-VEMP and O-VEMP) with initial hearing loss severity and hearing recovery after treatment. 방법:The study population consisted of 142 patients with SSNHL with or without vertigo, who had undergone bithermal caloric test, C-VEMP and O-VEMP. The hearing loss severity and hearing outcomes were analyzed to find out statistical correlation with presence of vertigo, loss of caloric responses, and abnormal C-VEMP and O-VEMP results. 결과:Presence of vertigo symptom was significantly associated with severity of hearing loss at presentation (p=0.023) but not associated with treatment outcome. Analysis of caloric response and C-VEMP showed abnormal results of the tests are not significantly associated with either hearing loss severity or hearing recovery. However, patients with abnormal O-VEMP results were significantly associated with more severe hearing loss at initial presentation. 결론:From the study, we found that the symptom of vertigo and abnormal result of O-VEMP test are more associated with hearing loss severity at initial presentation. None of the vestibular function tests and vertigo symptom presence showed association with treatment outcome in SSNHL patients.