| Methods |
Randomised controlled trial |
| Participants |
52 patients with chronic, decompensated tinnitus |
| Interventions |
4 groups: 1) noise generators (Viennatone Silent Star), 2) tinnitus retraining therapy, defined by a combination of tinnitus coping therapy and noise generation, 3) tinnitus coping therapy alone, and 4) no treatment |
| Outcomes |
Tinnitus severity was measured with the German Tinnitus Questionnaire (an instrument developed by the main author and described by him as having high validity and reliability) and a visual analogue score of tinnitus annoyance |
| Notes |
— |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Allocation concealment (selection bias) |
Unclear risk |
C |
