About Tinnitus Evidence

The one distinction that matters most

🔉 Loudness means the tinnitus percept itself became quieter or less present — measured with psychoacoustic loudness matching or loudness ratings. 🧠 Distress means the person's reaction improved — lower THI or TFI questionnaire scores, better sleep, less anxiety, better quality of life — while the sound may be unchanged. Most treatments with good evidence improve distress, not loudness. We show both, separately, everywhere, and never present a distress improvement as if the sound got quieter.

How we research the evidence

We screen hundreds of research results from sources including PubMed, ClinicalTrials.gov, Cochrane reviews, FDA records and major clinical guidelines. Around 170 unique studies, trials, guidelines and regulatory records were individually examined in building Tinnitus Evidence, with the most relevant research reviewed in greater detail. The current database includes 67 research records (plus separately tracked clinical-trial registry records and regulatory records), each checked against its primary source.

For every included record we consider study quality, results, negative findings, replication, safety and potential conflicts of interest — and we separately evaluate whether an intervention actually reduced tinnitus loudness or primarily helped reduce distress and its impact on daily life. New research is monitored weekly, and corrections and retractions of cited research are checked on an ongoing schedule. Important new findings do not automatically change evidence ratings or rankings without additional verification. Tinnitus Evidence is designed to help people understand the research, including its limitations and uncertainties — it is an educational evidence-navigation resource, not medical advice.

Research limitations

In the interest of scientific transparency: our research process does not systematically search every scientific database or every non-English publication. Databases and sources we do not currently search directly include EMBASE, Scopus, Web of Science, PsycINFO and CINAHL; some international trial registries (such as ChiCTR) that lack public interfaces; non-English literature (reached mainly through English-language systematic reviews); and conference abstracts or preprints as a systematic source. Important research from these channels usually reaches the sources we do monitor — for example through PubMed indexing at publication — but sometimes later than specialists would see it. Ongoing weekly monitoring, periodic independent audits, retraction/correction checks and evidence updates are used to reduce these limitations over time, and our audit records are public.

Tinnitus is not one condition

Roughly 14% of adults report some tinnitus and about 2% report severe tinnitus (global meta-analysis: Jarach 2022, JAMA Neurology) — but "tinnitus" covers very different situations that can require very different evaluation. Pulsatile tinnitus (rhythmic, heartbeat-synchronized) can have physical vascular causes that need imaging to identify — some treatable, a few dangerous. Somatosensory tinnitus (modulated by jaw or neck movement) has formal diagnostic criteria (Michiels 2018) and its own evidence base. Tinnitus with sudden hearing loss is time-sensitive. That heterogeneity is why this site tags treatments by studied population, shows narrow-population warnings, and why the My Tinnitus Profile red-flag check points characteristics like pulsatile tinnitus, sudden hearing loss, one-sided tinnitus or neurological symptoms toward professional evaluation. The site cannot determine which subtype anyone has — only a clinical evaluation can.

Severe distress and crisis support

The measures behind the numbers

Results on this site frequently cite standard questionnaires, and it matters what they do and do not measure. The Tinnitus Functional Index (TFI; Meikle 2012, Ear & Hearing) scores tinnitus impact 0–100; a drop of about 13 points is the commonly used threshold for meaningful improvement. The Tinnitus Handicap Inventory (THI; Newman 1996) and the Tinnitus Questionnaire (TQ) are older impact/handicap measures with their own thresholds. All of these measure how much tinnitus affects a person — none of them measures how loud the tinnitus is, which is why a THI/TFI improvement is never presented here as evidence the sound got quieter. Loudness requires its own measures (psychoacoustic loudness matching, loudness ratings). The international COMiT'ID consensus (Hall 2018) formalized that different intervention types should measure different core outcome domains — the methodological basis for our refusal to reduce treatments to a single universal "effectiveness score."

Evidence tiers

• Tier 1 — Strongest current evidence. Quality trials, meaningful benefit, reproducibility, safety, independent research, availability.
• Tier 2 — Promising. Meaningful human results with limitations: small trials, limited replication, manufacturer funding, short follow-up.
• Tier 3 — Experimental / emerging. Interesting mechanism or early evidence, insufficient proof.
• Tier 4 — Symptom management / coping. Improves distress, sleep or quality of life with limited evidence of loudness change.
• Tier 5 — Weak or unsupported. Poor-quality or contradictory evidence, failed trials, or heavy marketing with weak science.

How rankings work

The Top 10 weighs ten dimensions together: evidence quality (design, blinding, controls), size of benefit, loudness effect and distress effect (always scored separately), replication, study quality, safety, availability, regulatory status, and independent confirmation (non-manufacturer evidence). Novelty and media attention are explicitly excluded — during our Phase 2 audit an adversarial review demoted one treatment and removed another from the list for exactly that bias, and those changes are logged publicly in each treatment's change history. Every ranked card carries a plain-English "Why #N?" line plus an expandable research-detail breakdown. Rankings also carry explicit uncertainty information: we stress-tested the order under six reasonable weighting schemes, and each card is labeled "Stable rank" or "Weighting-sensitive" with the detail of how far it can move — because a ranking is a judgment about evidence, not a measurement, and it is never a treatment recommendation.

How the Evidence Profile bars work

Every treatment page carries an Evidence Profile: evidence quality (from the 1–5 evidence score), replication, loudness evidence and distress evidence (the structured none/limited/moderate/strong ratings), safety (a reviewed tolerability rating), availability (derived from regulatory status and access), and independence — who produced the evidence: primarily independent researchers, a mix, or primarily the treatment's own sponsor. Replication uses five honest categories: none yet · same group/sponsor only (repeats by the same lab or manufacturer are not independent replication) · limited independent · strong independent · and conflicting results, shown as its own amber-striped state when independent attempts disagree — disagreement is different from both "weak" and "none," and is never forced onto the positive scale. The evidence-quality bar has five segments — one per point of the 1–5 score, so 4/5 and 5/5 are visually distinct. The other bars show qualitative categories — Strong fills 4 segments, Moderate 3, Limited 2, Weak 1, None 0 — and a hatched bar means not yet assessed, because unknown is not the same as weak. We deliberately show no percentages and no single "effectiveness score": tinnitus studies measure different outcomes in different populations, and one universal number would be scientifically misleading. Changes to these values go through the same held-for-review process as rankings — they never change automatically.

Evidence score (1–5)

Scored from study quality, size, randomization, blinding, sham/placebo control, independent replication, clinical significance, follow-up length, safety, conflicts of interest and regulatory evidence. The reasoning behind every score is stored and shown on the treatment page, and score changes are logged in each treatment's change history with the reason.

Source hierarchy

When the same development appears in many places we rank credibility roughly as: regulatory record / original trial → peer-reviewed original research → systematic review / meta-analysis → university or hospital publication → trial registry → professional medical organization → reputable medical journalism → company press release → general media → blogs and testimonials. A lower source never overrides stronger primary evidence, and marketing claims are always kept separate from research evidence.

Skepticism, both ways

We actively flag: marketing beyond the published evidence, manufacturer-sponsored studies, missing sham controls, self-report-only results, small samples, short follow-up, subgroup-only effects, high dropout, and press releases stronger than the papers behind them. We also avoid dismissing a treatment merely because it is new. Failed and negative trials are shown prominently — they are information, not embarrassments.

How updates happen — and where automation is used

Tinnitus Evidence is kept current by an automated pipeline that runs once a week. Being straight about what that means:

• Automated systems monitor trusted research sources (PubMed, ClinicalTrials.gov, FDA, NIH/NIDCD, Cochrane ENT, major journals, EMA and others), identify relevant new material, extract structured study information (design, sample size, endpoints, outcomes, funding), compare findings against our existing evidence record, and classify weekly updates. Every item links to its original source.
• Routine research updates — a new study report, a trial status change verified at the registry, a follow-up publication — publish to "This Week in Tinnitus Research" automatically, after automated verification of the source, identifiers, dates, and duplicate checks. These items report what happened; they do not change our conclusions.
• Anything that could change a conclusion is never automatic. A possible evidence-score, tier, ranking, loudness/distress-rating, safety or regulatory-status change is placed in a held queue with a full proposed-change report. The existing public assessment stands unchanged until that hold is resolved — one new paper is never allowed to silently rewrite a medical conclusion. Where a held item's underlying fact is verified, it may appear in the weekly feed marked "Impact on Tinnitus Evidence rating: Under evaluation."
• Company announcements are monitored for pipeline intelligence but always labeled "Company-reported development" and never treated as independent evidence. Regulatory statuses update only against authoritative records (FDA databases, ClinicalTrials.gov, EMA), never from press coverage.
• Missing information is never inferred — items say "Not reported" or "Unable to verify." If a week's scan finds nothing meaningful, the feed says exactly that rather than manufacturing news.
• Retractions and corrections are monitored monthly: every research paper cited on this site is re-checked against PubMed and Crossref for retraction, expression-of-concern and erratum notices. A detected notice is flagged visibly on the affected study record and routed to held review — cited research is never silently left standing after its source is withdrawn.

Automated analysis is a monitoring and triage tool — it does not replace medical judgment, and this site does not claim physician or clinician editorial review of weekly items. A complete audit trail (source, identifier, extraction, classification, and publish/hold decision) is kept for every automated update.

Medical disclaimer

Corrections & editorial integrity

Evidence changes, and so do we — visibly. Our trust model:

• Corrections are made and shown, not hidden. When a factual error is found — by our own audits or by a reader — the record is corrected and the change is logged in that record's public history with what changed, the source, and why.
• Retractions and errata are monitored. Every cited paper is re-checked monthly against PubMed and Crossref; a detected notice is flagged visibly on the study record and reviewed for evidence impact.
• Material evidence changes are verified before ratings change. New findings that could change a score, tier, ranking or safety assessment are held for verification — the published assessment stands unchanged until the review completes, and the change (or the decision not to change) is documented.
• Ranking changes are documented in the ranking history with reasons, and ranking uncertainty is disclosed rather than smoothed over.
• Uncertainty is retained. "Not yet assessed," "conflicting results" and "unable to verify" are honest states we display, never gaps we paper over.

Spotted an error? The fastest route is the correction process above — every claim on this site links to its primary source so you can check us.

Transparency

Every treatment page shows: last reviewed date, evidence-included-through date, number of studies, evidence score with reasoning, a confidence level, and its full change history. Facts we could not verify against a primary source are marked low-confidence rather than guessed.