TABLE 1.
Subject and tinnitus characteristics (n = 20) between good (>70% suppression) and poor (<50% suppression) responders
| Good responders (n = 7) | Poor responders (n = 13) | P value | |
|---|---|---|---|
| Subject characteristics | |||
| Age (years) | 57 (16) | 62 (9) | 0.75 |
| Pure tone average threshold at 0.5, 1, 2, and 4 kHz | 42 (22) | 53 (14) | 0.19 |
| Self-reported noise exposure—no | |||
| No | 3 | 6 | 1.0 |
| Yes | 4 | 7 | |
| Self-reported insomnia—no | |||
| No | 3 | 6 | 1.0 |
| Yes | 4 | 7 | |
| Self-reported anxiety—no | |||
| No | 4 | 7 | 1.0 |
| Yes | 3 | 6 | |
| Self-reported depression—no | |||
| No | 4 | 10 | 0.61 |
| Yes | 3 | 3 | |
| Beck Depression Inventory (0–63) | 12 (9) | 7 (7) | 0.25 |
| Beck Anxiety Inventory (0–63) | 10 (10) | 9 (12) | 0.69 |
| Tinnitus characteristics | |||
| Localization of tinnitus—no | |||
| Unilateral, right | 0 | 0 | 0.23 |
| Unilateral, left | 2 | 2 | |
| Bilateral | 5 | 11 | |
| Subjective judgment of tinnitus type—no | |||
| Tonal | 1 | 4 | 0.69 |
| Non-tonal | 3 | 5 | |
| Both | 3 | 4 | |
| Tinnitus duration (years) | 18 (15) | 18 (18) | 0.69 |
| Tinnitus pitch-matched frequency or Tf (Hz) | 6929 (2090) | 7123 (1691) | 0.82 |
| Hearing threshold at Tf (dB SPL) | 58 (25) | 79 (13) | 0.07 |
| Equal loudness level at Tf (dB SPL) | 69 (23) | 84 (14) | 0.14 |
| Equal loudness level atTf(dB SL) | 12 (4) | 6 (5) | 0.02 |
| Tinnitus ranking (0–10) | 4 (2) | 6 (1) | 0.03 |
| Tinnitus Handicap Inventory (0–100) | 52 (35) | 42 (22) | 0.53 |
| Tinnitus Severity Index (0–100) | 31 (14) | 33 (8) | 0.82 |