Table 1 |
|
|
Criteria for hearing improvement determined by the Sudden Deafness Research Committee of the Japanese Ministry of Health, Labour and Welfare in 1984 |
|
|
Improvement |
Criteria |
|
|
|
|
Complete recovery |
Recovery of a hearing level within 20 dB at all five frequencies tested (0.25, 0.5, 1.0, 2.0 and 4.0 kHz) or recovery to the same level as the opposite side in pure tone auditometry |
|
|
|
|
Marked recovery |
More than 30 dB recovery in the mean hearing level at the five frequencies tested |
|
|
|
|
Slight recovery |
Recovery of 10 to 29 dB in the mean hearing level at the five frequencies tested |
|
|
|
|
No recovery |
Less recovery than 10 dB in the mean hearing level at the five frequencies tested |
|
|
|
|
Nakagawa et al. BMC Medicine 2010 8:76 doi:10.1186/1741-7015-8-76 |
|
