Figure 6.

Relation between clinical outcomes and treatment usage/dosage over first 4 months of treatment.

Note: Solid bars denote (a) mean improvement in tinnitus disturbance (as measured by a reduction in the Tinnitus Reaction Questionnaire [TRQ] score) or (b) the percentage of patients in each group who reported an improvement in the TRQ score of at least 40%. Low users reported usage of less than 1.5 hours per day, moderate users between 1.6 and 2 hours per day, and high users more than 2 hours per day. Differences between usage groups were statistically significant (p < .01).