About this trial
Tinnitus - the awareness of sound without any outside source - affects around 15% of people and can cause anxiety and depression. Treatment options are limited and do not address tinnitus directly (e.g., reduce its loudness). To do that, we must change brain activity causing tinnitus. Low-dose electrical stimulation, using a technique called transcranial Direct Current Stimulation (tDCS), is a promising approach. The technique is safe and easy to administer. Several small studies have tested tDCS for tinnitus showing some benefits.
To assess whether these benefits will generalise to other patients, we need to conduct a randomised controlled trial - a large, rigorously controlled experiment based on prior agreed procedures. Clinical trials are expensive and time-consuming to run and thus require meticulous pilot work to establish the most effective treatment regimens and the most sensitive measures of treatment outcome. The current study aims to provide such pilot information for a clinical trial of tDCS treatment of tinnitus. Using a total of 40 patients, we will establish how to best to administer tDCS and measure resulting changes in tinnitus perception and associated brain activity.
The current study is a crucial first step towards determining whether or not tDCS can effectively treat tinnitus.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Aged 18 or over
Suffering from subjective idiopathic tinnitus
Sufficient understanding of English to be able to provide informed consent
Able to safely undergo tDCS
Disqualifiers
Aged under 18
Not suffering from tinnitus or suffering from objective tinnitus
Insufficient understanding of English to be able to provide informed consent
Unable to safely undergo tDCS as assessed by tDCS Safety Questionnaire
Trial design
Parallel
Treatments tested in this trial
transcranial Direct Current Stimulation
Devicetranscranial Direct Current Stimulation
Treatment groups
Trial outcomes
Primary outcomes
Proof of concept
Measured by protocol compliance and attrition
Secondary outcomes
Tinnitus symptom severity
Measured by Tinnitus Functional Index (TFI); maximum score: 100, higher score indicates greater tinnitus symptom severity
Tinnitus loudness
Measured by 10-point visual analogue scale, higher score indicates higher tinnitus loudness and by audiometric tinnitus loudness matching, with higher dB indicating higher loudness
Depression
Measured by Patient Health Questionnaire (PHQ-9) scores can range from 0 to 27 with a higher score indicating more severe symptoms
Anxiety
Measured by Generalised Anxiety Disorder Assessment (GAD-7) scored from 0 to 21, with a higher score indicating more severe anxiety
Sponsors and contacts
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