What is a high THI score?

THI scores run from 0 to 100. Published severity categories describe 0 to 16 as slight or no handicap, 18 to 36 as mild, 38 to 56 as moderate, 58 to 76 as severe, and 78 to 100 as catastrophic. These categories are clinical descriptors, not diagnoses, and an audiologist interprets them alongside other information.

Is the THI used to diagnose tinnitus?

No. Tinnitus diagnosis is based on clinical history and examination, not on a questionnaire score. The THI measures the distress and functional impact associated with tinnitus, which helps track burden over time and assess how much a person's daily life is affected.

How much does the THI need to change for a treatment response to be real?

Research literature commonly cites a change of approximately 20 points as a clinically meaningful difference on the THI, though this varies across studies. An audiologist or researcher uses this threshold to distinguish genuine improvement from normal score variation.

Can I fill out the THI myself?

The THI questions are publicly available in the original research literature. However, score interpretation and clinical decision-making based on the results should be done by a qualified healthcare professional with knowledge of your full clinical picture.

Tinnitus Handicap Inventory (THI): the 25-question distress score

What the Tinnitus Handicap Inventory is

The Tinnitus Handicap Inventory (THI) is a validated, 25-item self-report questionnaire that measures the functional, emotional, and catastrophic impact of tinnitus on a person’s daily life. It was developed by Newman, Jacobson, and Spitzer and first published in 1996, and it remains one of the most widely used outcome measures in tinnitus research and clinical practice.

Each question asks the person to respond “Yes,” “Sometimes,” or “No,” yielding point values of four, two, and zero respectively. Total scores range from 0 to 100, with higher scores representing greater tinnitus-related distress and handicap.

The three subscales

The 25 items are divided into three subscales that assess different dimensions of tinnitus impact.

Functional subscale

The functional subscale contains 11 items and addresses how tinnitus affects concentration, reading, sleep, quiet activities, work, and social situations. Questions probe whether tinnitus makes it difficult to focus on tasks, whether it interferes with understanding speech or following conversations, and whether it disrupts sleep.

Emotional subscale

The emotional subscale has nine items covering feelings of irritability, depression, anxiety, frustration, and despair related to tinnitus. These items recognize that for many people with significant tinnitus burden, the psychological dimensions of the condition are as disabling as the perceptual ones.

Catastrophic subscale

The catastrophic subscale contains five items that measure whether the person feels unable to escape tinnitus, whether they believe they have a serious disease, and whether they cannot function at all because of it. High scores on this subscale often correspond to severe psychological distress and may indicate a need for specialized support.

Severity categories

Published THI scoring divides total scores into five named categories. Scores of 0 to 16 are described as slight or no handicap, with tinnitus present but not significantly interfering with daily function. Scores of 18 to 36 correspond to mild handicap, where tinnitus causes occasional difficulty. Moderate handicap (38 to 56) reflects more consistent interference with activities and emotional wellbeing. Severe handicap (58 to 76) indicates substantial and near-constant impact on daily life. Scores of 78 to 100 are labeled catastrophic, reflecting overwhelming distress.

These categories were derived from the original validation sample and are widely cited, though different research groups have applied somewhat different cutoffs. The AAO-HNS clinical practice guideline for tinnitus recommends baseline outcome measurement, with the THI being one of the recommended tools.

Why audiologists use it

The THI serves several clinical functions. At initial evaluation, it quantifies the burden of tinnitus in a standardized way that goes beyond a clinician’s subjective impression and captures aspects of impact that patients may not raise spontaneously during an appointment.

Across time, serial THI scores document whether a patient’s burden is changing. This is particularly important in tinnitus management because tinnitus loudness, as measured by psychoacoustic testing, often does not correlate well with how distressing the tinnitus is. A person may have relatively quiet tinnitus by objective measurement but experience severe functional and emotional impact. The THI captures this discrepancy.

The British Tinnitus Association (BTA) notes that the relationship between tinnitus loudness and distress is weak, and that psychological and attentional factors play a large role in how much tinnitus affects daily life. The THI is designed to measure these downstream impacts rather than the acoustic properties of the tinnitus itself.

Minimum clinically important difference

A key concept in using the THI as an outcome measure is the minimum clinically important difference (MCID): how large a score change needs to be before it reflects a genuine, meaningful improvement rather than normal measurement variation or chance. Published literature has proposed an MCID of approximately 20 points on the THI, meaning a reduction of at least 20 points is generally considered a clinically meaningful treatment response. This figure appears across multiple tinnitus intervention studies, including those examining cognitive behavioral therapy, sound therapy, and tinnitus retraining therapy, though the exact threshold continues to be refined in newer research.

Limitations of the THI

The THI is a useful and well-validated tool, but it has limitations. It captures distress at a moment in time, and tinnitus burden fluctuates. A single administration may not represent the person’s typical burden, which is why baseline and follow-up measurements are more informative than a single score.

The questionnaire also does not assess tinnitus characteristics such as pitch, loudness, or tonal quality. It does not measure sleep quality separately with the precision of dedicated sleep questionnaires, and it does not assess anxiety or depression with the granularity of instruments designed specifically for those conditions. In a comprehensive tinnitus assessment, the THI is typically used alongside other measures rather than in isolation.

Some researchers have also proposed alternative or abbreviated questionnaires, including the Tinnitus Functional Index (TFI) and the Tinnitus Questionnaire (TQ), which have different item structures and may be more sensitive to change in specific clinical populations. The choice of instrument often depends on the research protocol or clinical setting.

Using the THI as a conversation starter

Beyond its numerical value, the THI can help structure the clinical conversation. Patients who have filled it out before an appointment have already articulated their concerns in a structured way, which can make it easier to identify which aspects of tinnitus are most affecting them. An audiologist reviewing a completed THI can immediately see whether sleep, concentration, work, or emotional wellbeing is the primary burden, guiding the focus of the consultation.

If symptoms persist or change, see an audiologist or physician.