Table 2. Criteria for Hearing Recovery in Acute Low-Tone Sensorineural Hearing Loss

Ministry of Health and Welfare, Special Disease Acute Severe Sensorineural Hearing Loss Research Group, 1999 Annual Research Report, 2000
1. Recovery (Complete Recovery)(1) The hearing levels at three low tones (0.125, 0.25, and 0.5 ㎑) were restored to within 20 ㏈(2) If the hearing in the healthy ear is stable, the hearing in the affected ear has improved to the same level 2. Partial Recovery: Healing of 10 ㏈ in the average hearing level at the three low tones without achieving full recovery 3. Unchanged: Cases with <10 ㏈ improvement in the average hearing level at the three low frequencies 4. Progression: Excluding the above 1, 2, and 3

Ministry of Health and Welfare, Special Disease Acute Severe Sensorineural Hearing Loss Research Group, 1999 Annual Research Report, 2000

1. Recovery (Complete Recovery)(1) The hearing levels at three low tones (0.125, 0.25, and 0.5 ㎑) were restored to within 20 ㏈(2) If the hearing in the healthy ear is stable, the hearing in the affected ear has improved to the same level 2. Partial Recovery: Healing of 10 ㏈ in the average hearing level at the three low tones without achieving full recovery 3. Unchanged: Cases with <10 ㏈ improvement in the average hearing level at the three low frequencies 4. Progression: Excluding the above 1, 2, and 3