Tinnitus, Suicide, and Suicidal Ideation: A Scoping Review of Primary Research

Tinnitus (the perception of sound in the absence of any corresponding external source) is highly prevalent and can be distressing. There are unanswered questions about how tinnitus, suicidal thoughts, and suicidal behaviours co-occur and interact. To establish the extent of scientific literature, this scoping review catalogued primary reports addressing the associations between tinnitus, suicidal ideation, attempted suicide, and death by suicide. We searched OvidSP, Medline, EMBASE, PsycINFO, CINAHL, Google Scholar, EThoS, and ProQuest for all studies and case reports on ideation and/or attempted and/or completed suicide in the context of tinnitus. Twenty-three studies were included, and data were charted according to study type. Several epidemiological and other observational studies gave evidence of risk factors and an association between suicidal ideation, suicidal behaviour, and tinnitus. However, there was no evidence of the direction of causality. Qualitative studies are indicated to explore the patient's experience and understand the dynamics of any interaction between tinnitus and suicidal thoughts and behaviours. A theory-informed model of tinnitus and suicide needs to be developed to inform the development of interventions and how tinnitus patients are supported clinically.

A multi-site service evaluation of the tinnitus care decision aid

OBJECTIVE

Shared decision-making is a principle of health care delivery across the world. The first international standard decision aid for tinnitus care was developed in 2018. This decision aid is in use across the UK. It is free to use and access from the British Tinnitus Association website. Our objective was to compare routine care with the care that also included the decision aid as part of care for their patients.

DESIGN

A multi-site service evaluation included pre-post comparison of decisional conflict in sequential new patients seeking help with tinnitus. Informal interviews with staff and service managers explored how practical and feasible the decision aid was in routine practice.

STUDY SAMPLE

We present data from four contrasting clinical services, including services in England and Wales, acute and community services and those operated by Hearing Therapists and Audiologists.

RESULTS

Across these contrasting services, the inclusion of the decision aid was associated with a reduction in decisional conflict in patients. The decision aid was feasible to administer, acceptable to patients and clinicians without creating a burden in appointments.

CONCLUSIONS

These evaluations suggest that the decision aid is feasible to administer and reduces patient decisional conflict. It appears to benefit clinical services in practice.

Guidelines for Best Practice in the Audiological Management of Adults with Severe and Profound Hearing Loss

Individuals with severe to profound hearing loss are likely to present with complex listening needs that require evidence-based solutions. This document is intended to inform the practice of hearing care professionals who are involved in the audiological management of adults with a severe to profound degree of hearing loss and will highlight the special considerations and practices required to optimize outcomes for these individuals.

Drug S-oxidation and phenylalanine hydroxylase: a biomarker for neurodegenerative susceptibility in Parkinson's disease and amyotrophic lateral sclerosis

Background The S-oxidation of S-carboxymethyl-L-cysteine has been reported previously to be a biomarker of disease susceptibility in Parkinson's disease and amyotrophic lateral sclerosis. In the present investigation, the original observations have been extended and confirmed. Methods Meta-analysis of previously published investigations into the S-oxidation polymorphism together with new subject data was evaluated. Results The incidence of the poor metaboliser phenotype (no urinary recovery of S-oxide metabolites) was found to be 3%-7% within healthy and non-neurological disease populations, whereas 38% of the Parkinson's disease subjects and 39% of the amyotrophic lateral sclerosis group were phenotyped as poor metabolisers. The consequent odds risk ratio of developing Parkinson's disease was calculated to be 33.8 [95% confidence interval (CI), 13.3-86.1] and for amyotrophic lateral sclerosis was 35.2 (95% CI, 13.0-85.1). Conclusions The possible involvement of the enzyme responsible for this S-oxidation biotransformation reaction, phenylalanine hydroxylase, should be further investigated to elucidate its potential role in the mechanism(s) of toxicity in susceptible individuals displaying these diseases. The "Janus hypothesis," possibly explaining why phenylalanine hydroxylase is a biomarker of neurodegenerative disease susceptibility, together with the general theme that this concept may apply to many other hitherto unsuspected enzyme systems, is presented.

Prevalence & characteristics of severe and profound hearing loss in adults in a UK National Health Service clinic

OBJECTIVE

To estimate the prevalence of severe and profound hearing loss in a clinical population and to report the audiological and hearing-aid characteristics for this group, as well as outcome measures from use of hearing aids.

DESIGN

A retrospective observational study initially, followed by a postal Glasgow health status inventory (GHSI) to establish the patients functional outcomes.

STUDY SAMPLE

A clinical database of 32 781 cases was interrogated from which 2199 cases of severe /profound hearing loss were identified. From these, an adult sample stratified in terms of age and gender of n = 302 was contacted.

RESULTS

An estimated 6.7% of the local clinical population and 0.7% of the general population were found to have hearing > 70 dB averaged over 0.5, 1, and 2 kHz. Most patients were fitted with bilateral hearing aids, using a non-linear prescription, and as a group they reported a high level of social support.

CONCLUSIONS

This study has estimated the prevalence of severe and profound hearing loss as 6.7% of the clinical population, and 0.7% of the general population. This is consistent with previous work, although it probably underestimates the prevalence. Further work is indicated to strengthen the estimate.