Histogram showing the use of different types of questionnaire in diagnostic (light bars) and outcome (dark bars) assessment stages. Responses are given as the number of respondents (±95% confidence intervals) who indicated that they use each questionnaire. THI, Tinnitus Handicap Inventory; Own, a self-styled questionnaire; HADS, Hospital Anxiety and Depression Scale; GHABP, Glasgow Hearing Aid Benefit Profile; HQ, Hyperacusis Questionnaire; GHTQ, Goebel-Hiller Tinnitus Questionnaire; TEQ, Tinnitus Effect Questionnaire; Beck Q, Beck Anxiety Inventory and Beck Depression Inventory; COSI, Client Oriented Scale of Improvement.