Tinnitus Research Digest: CBT Durability, Brainstem Findings, and Cardiovascular Links

This follow-up analysis examined 49 participants from an original nonrandomized clinical trial of internet-based cognitive behaviour therapy (ICBT) for tinnitus. The original trial recruited participants from January 2016; follow-up assessments were conducted at 1, 4, 5, and 6 years after the 8-week guided intervention, which consisted of 21 online modules. Of the 138 original participants invited to follow up, 49 (35.5%) completed the 6-year assessment. The group was 63% male, with a mean age of approximately 54 years.

At 6 years, the reduction in tinnitus distress was substantial and stable, with a large within-group effect size (Cohen’s d = 1.00; 95% CI, 0.80–1.32). Using the Reliable Change Index criterion, 19 of 49 participants (39%) met the threshold for clinical significance; using the minimal clinically important difference criterion, 27 of 49 (55%) did. Improvements in anxiety, depression, insomnia, and satisfaction with life also held, though gains on hearing disability and hyperacusis did not persist.

Key limitations: there was no active control condition, the study was nonrandomized, and only 35.5% of invited participants completed the 6-year follow-up, which introduces selection bias — those who responded may have been those who benefited most. Replication in a randomized controlled trial with higher retention would strengthen confidence in these findings.

This cross-sectional study used a clinical dataset of 149 adults with chronic tinnitus to examine whether psychological distress — specifically anxiety and tinnitus distress — is associated with the amplitude of auditory brainstem responses (ABRs), a standard diagnostic measure of lower auditory pathway function.

The study found significant positive correlations between ABR amplitudes and psychological distress scores throughout the auditory brainstem pathway. Regression modelling identified anxiety level (measured by the HADS-A scale) as a significant predictor of ABR wave I, III, and V amplitudes. Male patients showed smaller wave III and V amplitudes, and patients with additional hyperacusis showed larger wave V amplitudes. No significant effects of age or hearing loss on ABR amplitude were found in this dataset.

The sample size of 149 is reasonably large for this type of neurophysiological study, and the multivariate design accounts for several confounding variables. However, the cross-sectional design means causality cannot be established — it is unclear whether anxiety raises ABR amplitudes or whether higher central auditory gain drives both tinnitus distress and anxiety. Replication in a longitudinal design, and ideally with pre- and post-anxiety treatment measurements, would clarify the relationship. The study also relied on a single clinical site’s dataset, which may limit generalisability.

This cross-sectional study analysed data from four cycles of the National Health and Nutrition Examination Survey (NHANES) covering 2009 to 2018, with a total of 9,185 adult participants. The researchers investigated whether a self-reported history of angina pectoris was associated with higher odds of reporting tinnitus, after adjusting for age, sex, income, hearing loss, noise exposure, smoking, and cardiometabolic conditions.

In the unadjusted model, adults with angina had 3.30 times higher odds of reporting tinnitus (95% CI: 2.18–4.91). This association remained statistically significant after adjusting for the full set of confounders, though the effect size was attenuated. The authors suggest this may reflect shared vascular or systemic mechanisms between the two conditions.

The critical limitation is the study design: because NHANES is cross-sectional, it cannot establish whether angina precedes tinnitus, follows it, or whether both arise from a shared underlying cause. Both tinnitus and angina were self-reported, which introduces measurement error. The study also cannot rule out that unmeasured factors — such as medication use or systemic inflammation — explain part of the association. Longitudinal studies are needed to clarify the direction and mechanism of the relationship.

This pilot study evaluated a multidisciplinary tinnitus management protocol built around the Sensation-Emotion-Cognition (SEC) model, a framework targeting three dimensions of the tinnitus experience: physical sensation, emotional response, and cognitive factors. The protocol combined sound therapy, counselling, relaxation training, and cognitive behavioural therapy (CBT), which could be delivered as unguided internet CBT, clinician-guided internet CBT, or six therapist-led sessions.

The study used a single-group pre-post design and reported results from 16 participants who completed the prospective component. Management confidence (measured by the 4C scale) increased substantially from a mean of 30.38 to 60.19. Tinnitus-related distress outcomes also showed pre-post changes. The abstract does not report confidence intervals for all outcomes, and the full statistical picture is partially obscured by the incomplete abstract text.

At 16 completers, the sample is too small to draw reliable conclusions about effect sizes or generalisability. There was no control group, so improvements cannot be attributed specifically to the SEC protocol rather than to attention, time, or regression to the mean. The authors acknowledge this themselves, describing results as exploratory. A controlled trial with a larger sample is required before this approach can be recommended as superior to existing tinnitus management pathways. The combination of CBT and sound therapy is not new; what the SEC model adds structurally is a defined organisational framework.

Based on available information, this appears to be a mechanistic study examining two neurophysiological processes proposed to contribute to tinnitus generation: enhanced central auditory gain (the brain turning up its sensitivity to compensate for reduced input from the ear) and disrupted cortical oscillations (irregular patterns of electrical activity in the auditory cortex). The study is authored by Hayes, Schormans, Sigel, Beh, Herrmann, and Allman and was published in 2020.

No abstract was available for this item, so specific details about study design, species (animal model or human participants), sample size, and specific findings cannot be reported here. Based on the title and authors, this appears to be a review or empirical study in the basic science tradition — focused on understanding biological mechanisms rather than evaluating a treatment.

Without access to the full abstract or paper, it is not possible to assess effect sizes, sample size, or methodological limitations. Readers should consult the source directly for design and result details. What can be said is that this line of research — mapping how central auditory gain and oscillatory activity interact in tinnitus — is an active area of basic science that may eventually inform treatment targets, but no clinical applications follow directly from mechanistic research of this type.