Effects of long term transcranial direct current stimulation over auditory cortex on tinnitus symptoms and adverse effects
Preliminary studies have demonstrated therapeutic potentials of transcranial direct current stimulation (tDCS) over auditory cortex (AC) for chronic tinnitus. However, the findings are controversial and most of the studies investigated effects of a single session tDCS and short after-effect ranging hours to some days (1, 2). To our knowledge there is no published study investigating the effects of repeated sessions of bilateral tDCS over auditory cortex with one month follow-up in a double blinded randomized clinical trial. This dataset presents the results of a double blinded placebo controlled trial investigated the effects of repeated sessions (10 sessions) of tDCS over AC with one month follow-up. The data of the two groups real tDCS (n=25) and sham tDCS (n=15) are reported. The dataset includes three main data groups: patients' and tinnitus specific data, data of the primary and secondary outcomes, and data on the adverse effects of and tolerability to tDCS. The first group includes demographic information, audiometric assessments, and tinnitus specific characteristics. The second group includes the scores of tinnitus handicap inventory (THI), tinnitus loudness, and tinnitus related distress based on 0-10 numerical visual analogue scale (VAS) scores. The values of the primary and secondary outcomes for pre-intervention and different time points of post interventions are presented. The scores of THI for pre-intervention and post-intervention at immediately and at one month follow-up; the scores of tinnitus loudness and distress scores for pre-intervention, and immediately, one hour, one week, and at one month after the last stimulation session are presented. Moreover, the adverse effects of and tolerability to the tDCS were assessed after last tDCS session.