Table 2.
Percent of MS and control subjects falling into five hearing ability categories as a function of ear side and tonal frequency, as defined by ANSI S3.6 (1996). See text for details.
| MS GROUP | .25 kHz | .50 kHz | 1.0 kHz | 2.0 kHz | 4.0 kHz | 8.0 kHz | Mean | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ear Side: | L | R* | L | R | L | R | L | R | L* | R | L | R | |
| ≤20dB (normal) | 92 | 82 | 92 | 84 | 92 | 88 | 84 | 81 | 74 | 75 | 74 | 75 | 82.75 |
| 21–40dB (mild) | 8 | 16 | 8 | 15 | 8 | 12 | 16 | 19 | 21 | 21 | 14 | 16 | 14.50 |
| 41–60dB (moderate) | 1 | 1 | 6 | 3 | 9 | 6 | 4.33 | ||||||
| 61–70dB (moderately severe) | 1 | 1.00 | |||||||||||
| 71–90dB (severe) | 3 | 3 | 3.00 | ||||||||||
| CONTROL GROUP | .25 kHz | .50 kHz | 1.0 kHz | 2.0 kHz | 4.0 kHz | 8.0 kHz | Mean | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ear Side: | L | R | L | R | L | R | L | R | L* | R | L* | R | |
| ≤20dB (normal) | 93 | 89 | 96 | 83 | 90 | 92 | 87 | 83 | 73 | 73 | 70 | 73 | 83.50 |
| 21–40dB (mild) | 7 | 7 | 4 | 14 | 10 | 7 | 13 | 16 | 20 | 17 | 21 | 14 | 12.50 |
| 41–60dB (moderate) | 1 | 1 | 1 | 6 | 7 | 7 | 7 | 4.28 | |||||
| 61–70dB (moderately severe) | 3 | 3 | 3 | 3 | 3.00 | ||||||||
| 71–90dB (severe) | 1 | 3 | 2.00 | ||||||||||
*
Columns not adding to 100% reflect rounding errors.