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Kelleni MT. Repurposing metformin to manage idiopathic or long COVID Tinnitus: self-report adopting a pathophysiological and pharmacological approach. Inflammopharmacology 2024; 32:945-948. [PMID: 38294616 PMCID: PMC11006725 DOI: 10.1007/s10787-023-01421-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/24/2023] [Indexed: 02/01/2024]
Abstract
Chronic tinnitus is a common neurological disorder that affects millions of patients globally with no available successful pharmacotherapy. It can be extremely bothersome to some patients to the extent that it occasionally qualifies as a disability that can hinder them from leading a normal life. In this short communication, the author discusses how he suffered from idiopathic tinnitus and how he managed to adopt a combined pathophysiological and pharmacological approach to the reason for the first time in the medical literature that low-dose metformin might be safely and effectively repurposed to manage at least a subset of tinnitus patients while discussing the potential role of adenosine receptor agonists as potential future tinnitus therapeutics.
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Affiliation(s)
- Mina T Kelleni
- Pharmacology Department, College of Medicine, Minia University, Minya, 61111, Egypt.
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2
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Marcrum SC, Engelke M, Goedhart H, Langguth B, Schlee W, Vesala M, Simoes JP. The Influence of Diet on Tinnitus Severity: Results of a Large-Scale, Online Survey. Nutrients 2022; 14:nu14245356. [PMID: 36558515 PMCID: PMC9784733 DOI: 10.3390/nu14245356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/30/2022] [Accepted: 12/03/2022] [Indexed: 12/24/2022] Open
Abstract
Optimization of dietary intake is an essential component in the multidimensional effort to prevent and manage chronic disease. Recently, demand has increased for nutrition-focused management strategies for chronic tinnitus. The primary aim of this study was to evaluate 10 dietary items for their association with changes in subjective tinnitus severity. A secondary aim was to develop an algorithm to better identify those individuals who might benefit from dietary modification strategies. A total of 5017 anonymous users of the TinnitusTalk forum completed an online survey regarding how various dietary items affected the severity of their tinnitus. Results suggest that, while intake of caffeine [positive effect (PE): 0.4%; negative effect (NE): 16.2%], alcohol (PE: 2.7%; NE: 13.3%, and salt (PE: 0.1%; NE: 9.9%) was most likely to influence tinnitus severity, it did so only for a small proportion of participants and reported effects were most commonly mild. Further, though a classification algorithm was able to leverage participant demographic, comorbidity, and tinnitus characteristics to identify those individuals most likely to benefit from dietary modification above chance levels, further efforts are required to achieve significant clinical utility. Taken together, these results do not support dietary modification as a primary treatment strategy for chronic tinnitus in the general population, though clinically meaningful effects might be observable in certain individuals.
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Affiliation(s)
- Steven C. Marcrum
- Department of Otolaryngology, University Hospital Regensburg, 93053 Regensburg, Germany
- Correspondence: ; Tel.: +49-941-944-9462
| | - Milena Engelke
- Department of Psychiatry and Psychotherapy, University of Regensburg, Bezirksklinikum Regensburg, 93053 Regensburg, Germany
| | | | - Berthold Langguth
- Department of Psychiatry and Psychotherapy, University of Regensburg, Bezirksklinikum Regensburg, 93053 Regensburg, Germany
| | - Winfried Schlee
- Department of Psychiatry and Psychotherapy, University of Regensburg, Bezirksklinikum Regensburg, 93053 Regensburg, Germany
- Institute for Information and Process Management, Eastern University of Applied Sciences, 9000 St. Gallen, Switzerland
| | | | - Jorge P. Simoes
- Department of Psychiatry and Psychotherapy, University of Regensburg, Bezirksklinikum Regensburg, 93053 Regensburg, Germany
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Nair RM, Ravi R, Joshi A, Deshpande S, Gunjawate DR. Vocal Health Care amongst Hindustani Classical Singers- A Mixed Methods, Cross-Sectional Survey. J Voice 2022:S0892-1997(21)00451-3. [PMID: 35074242 DOI: 10.1016/j.jvoice.2021.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/28/2021] [Accepted: 12/28/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The objective of the present survey was to profile the knowledge, attitude, and practices towards vocal health care amongst Hindustani classical singers. STUDY DESIGN Mixed-methods, cross-sectional questionnaire-based study. METHODS A self-reported questionnaire was developed and used to gather data on the knowledge, attitude, and practices of Hindustani classical singers towards vocal health care. An online survey link was generated, and responses were collected from self-identified trained Hindustani classical singers. Descriptive statistics was carried out for the closed-ended questions and inductive approach was used to analyse the responses of open-ended questions. RESULTS Ninety-four self-identified trained Hindustani classical singers participated in the study. The responses indicate good knowledge towards vocal health measures and positive attitudes towards vocal health care. The open-ended responses were analysed using an inductive approach. Although, 70% were aware about role of a speech language pathologist, only 9.7% reported of consulting one in the event of voice problem. Further, 70% singers reported of following precautions to avoid voice problems while 85.1% considered voice rest as necessary before a performance. The singers reported of using home remedies, vocal and non-vocal measures as a part of vocal health measures. CONCLUSIONS The present study helps to profile the knowledge, attitude, and practices towards vocal health care amongst Hindustani classical singers. It also helps to provide a basis for further studies to establish an empirical basis for the reported practices towards vocal health care.
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Affiliation(s)
- Raveena M Nair
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Rohit Ravi
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Ashwini Joshi
- Department of Communication Sciences and Disorders, University of Houston, Texas, USA
| | - Srijan Deshpande
- Manipal Centre for Humanities, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Dhanshree R Gunjawate
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India.
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Aljuaid SM, Mirza AA, Habib LA, AlHarthi LA, Alansari BM, AlQahtani BG, Althobaiti YA. Does Caffeine Intake Increase the Incidence of Tinnitus? A Systematic Review. Int Arch Otorhinolaryngol 2021; 25:e628-e632. [PMID: 34737834 PMCID: PMC8558950 DOI: 10.1055/s-0040-1718965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/01/2020] [Indexed: 12/05/2022] Open
Abstract
Introduction
Excessive caffeine intake has been thought to be a contributory factor for tinnitus. However, there has been no systematic review to elucidate the causal relationship between caffeine intake and the incidence of tinnitus.
Objectives
We performed the current review aiming at evaluating the evidence from the current literature for the relationship between caffeine intake and the incidence of tinnitus.
Data Synthesis
Databases including PubMed, Scopus, and Google scholar were searched for relevant articles. A total of 142 studies were screened for eligibility, of which four articles met our inclusion criteria: two were prospective cohorts and two were cross-sectional studies. Although one study found no association between caffeine consumption and the incidence of tinnitus, an inverse relationship was reported by two population-based studies. Concerning patients with preexisting tinnitus, reduction of caffeine intake in a subset who consumed 150 ml to 300 ml/day of coffee yielded a favorable outcome in tinnitus severity. However, those with higher dose intake were less prone to have improvement in the severity of tinnitus.
Conclusion
Although the current review was inconclusive, it appears that the incidence of tinnitus in previously unaffected individuals might be prevented by a high dose of caffeine intake. However, in preexisting tinnitus, a high dose of caffeine may adversely interfere with the efficacy of caffeine reduction.
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Affiliation(s)
- Sattam M Aljuaid
- Department of Otolaryngology, Head and Neck Surgery, King Abdulaziz Specialist Hospital, Taif, Saudi Arabia
| | - Ahmad A Mirza
- Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Lura A Habib
- College of Medicine, Taif University, Taif, Saudi Arabia
| | | | | | | | - Youssef A Althobaiti
- Department of Internal Medicine - Neurology Section, King Abdulaziz Specialist Hospital, Taif, Saudi Arabia
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Ghahraman MA, Farahani S, Tavanai E. A comprehensive review of the effects of caffeine on the auditory and vestibular systems. Nutr Neurosci 2021; 25:2181-2194. [PMID: 33888039 DOI: 10.1080/1028415x.2021.1918984] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Coffee, of which caffeine is a critical component, is probably the most frequently used psychoactive stimulant in the world. The effects of caffeine on the auditory and vestibular system have been investigated under normal and pathological conditions, such as acoustic trauma, ototoxicity, auditory neuropathy, and vestibular disorders, using various tests. Lower incidences of hearing loss and tinnitus have been reported in coffee consumers. The stimulatory effect of caffeine is represented by either a shorter latency or enhanced amplitude in electrophysiological tests of the auditory system. Furthermore, in the vestibular system, oculomotor testing revealed significant effects of caffeine, while other tests did not reveal any significant caffeine effects. It could be that caffeine improves transmission in the auditory and vestibular systems' central pathways. Importantly, the effects of caffeine seem to be dose-dependent. Also, inconsistent findings have been observed regarding caffeine's effects on the auditory and vestibular systems and related disorders. Overall, these findings suggest that caffeine does not strongly influence the peripheral auditory and vestibular systems. Instead, caffeine's effects seem to occur almost solely at the level of the central nervous system.
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Affiliation(s)
- Mansoureh Adel Ghahraman
- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeid Farahani
- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Tavanai
- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
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Karulkar RR, Ravi R, Gunjawate DR. Voice-related complaints and vocal and nonvocal habits of Hindustani classical singers: a questionnaire-based study. LOGOP PHONIATR VOCO 2020; 46:149-154. [PMID: 32648833 DOI: 10.1080/14015439.2020.1788158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE This study aimed to profile voice-related complaints, as well as vocal and nonvocal habits among Hindustani classical singers. METHOD Cross-sectional study design was used to profile voice-related complaints and vocal and nonvocal habits among Hindustani classical singers. Phase I involved developing a questionnaire for exploring vocal and nonvocal habits. Phase II involved the administration of the survey to 61 Hindustani classical singers. RESULTS Based on the overall findings, 41% of singers reported of at least three vocal symptoms. The most common vocal symptoms included out of breath while singing, felling tired after singing and experiencing tension or tightness in neck/shoulder. The commonly reported vocal habits included excessive phone use, loud coughing/sneezing, throat clearing and excessive speaking. A high consumption of caffeinated beverages and spicy food were also reported. CONCLUSION This study helps to highlight the voice-related complaints and vocal and nonvocal habits of Hindustani classical singers. Further studies, need to explore the prevalence of voice problems incorporating other dimensions of voice evaluation such as acoustic, auditory perceptual, self-reported and laryngeal examination.
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Affiliation(s)
- Rasika Rajiv Karulkar
- Building Blocks Rehabilitation, Mumbai, Maharashtra, India.,Comprehensive Thalassemia Care, PHO and BMT Centre, Mumbai, Maharashtra, India
| | - Rohit Ravi
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Dhanshree R Gunjawate
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India
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Abstract
Medications can have innumerable direct and indirect effects on laryngeal hydration, vocal fold mucosal integrity, laryngeal muscle function, and laryngeal sensation. Effects, therefore, can be subtle and slowly progressive over time. This article delineates the general classes of medications that are known to cause alterations of vocal function, highlights medical history symptoms that may help raise suspicion for medication-related vocal changes, and presents recommendations for approaches to treatment of these issues.
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Affiliation(s)
- Jonathan M Bock
- Division of Laryngology and Professional Voice, Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.
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Hussain K, Murdin L, Schilder AGM. Restriction of salt, caffeine and alcohol intake for the treatment of Ménière's disease or syndrome. Cochrane Database Syst Rev 2018; 12:CD012173. [PMID: 30596397 PMCID: PMC6516805 DOI: 10.1002/14651858.cd012173.pub2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Ménière's disease or syndrome is a chronic inner ear disorder that results in sporadic attacks of vertigo, sensorineural hearing loss, aural fullness and tinnitus.There is no definitive treatment for Ménière's disease and treatment options range from dietary modification through medication to surgery.Modification of diet, including restriction of salt, caffeine and alcohol intake, is a management option that is widely recommended to patients with Ménière's as a first-line treatment. There has not previously been a systematic review of this intervention. OBJECTIVES To assess the effects of dietary restriction of salt, caffeine and alcohol intake in patients with Ménière's disease or syndrome. SEARCH METHODS The Cochrane ENT Information Specialist searched the Cochrane ENT Trials Register; Central Register of Controlled Trials (CENTRAL); PubMed; Ovid Embase; CINAHL; Web of Science; ClinicalTrials.gov; ICTRP and additional sources for published and unpublished trials. The date of the search was 28 March 2018. SELECTION CRITERIA Randomised controlled trials of dietary modification, specifically salt, caffeine and alcohol restriction or substitution (or both), compared to no modification of these agents or a placebo intervention, in adult patients with Ménière's disease or syndrome. DATA COLLECTION AND ANALYSIS We used the standard methodological procedures expected by Cochrane. Our primary outcomes were control of vertigo or decrease in vertigo attacks, and adverse effects. Secondary outcomes included hearing (change in hearing loss or its progression), tinnitus (severity), perception of aural fullness, well-being and quality of life (overall changes), and other adverse effects. We planned to use GRADE to assess the quality of the evidence for each outcome. MAIN RESULTS We did not identify any studies that met the inclusion criteria for the review. AUTHORS' CONCLUSIONS There is no evidence from randomised controlled trials to support or refute the restriction of salt, caffeine or alcohol intake in patients with Ménière's disease or syndrome.High-quality research in this field is warranted. The best evidence may come from a randomised controlled trial comparing dietary interventions (e.g. low salt versus general healthy diet advice), using rigorous methodology for patient selection, randomisation and blinding, and strictly adhering to the Bárány Society diagnostic criteria. However, this research question might be more pragmatically addressed by using information from carefully constructed patient registries that include information on dietary intake of substances of interest such as salt, caffeine and alcohol. It will be important to address the question of any possible harms or unwanted effects of dietary modification.
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Affiliation(s)
- Kiran Hussain
- Faculty of Brain Sciences, University College LondonEar InstituteLondonUK
| | - Louisa Murdin
- Faculty of Brain Sciences, University College LondonEar InstituteLondonUK
| | - Anne GM Schilder
- Faculty of Brain Sciences, University College LondonevidENT, Ear Institute330 Grays Inn RoadLondonUKWC1X 8DA
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Sánchez-Sellero I, San-Román-Rodríguez E, Santos-Pérez S, Rossi-Izquierdo M, Soto-Varela A. Caffeine intake and Menière's disease: Is there relationship? Nutr Neurosci 2017; 21:624-631. [DOI: 10.1080/1028415x.2017.1327636] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Inés Sánchez-Sellero
- Department of Forensic Sciences, Pathology, Gynecology and Obstetrics, and Pediatrics, Division of Toxicology, Universidade de Santiago de Compostela, Veterinary School, Avenida Carballo Calero, s/n, 27002 Lugo, Spain
| | - Elena San-Román-Rodríguez
- Department of Otorhinolaryngology, Complexo Hospitalario Universitario Lucus Augusti, Calle Dr Ulises Romero, 1, 27003 Lugo, Spain
| | - Sofía Santos-Pérez
- Department of Otorhinolaryngology, Division of Neurotology, Complexo Hospitalario Universitario de Santiago de Compostela, Spain
- Department of Surgery and Medical-Surgical Specialities, Universidade de Santiago de Compostela, Travesía da Choupana, s/n, 15706 Santiago de Compostela, Spain
| | - Marcos Rossi-Izquierdo
- Department of Otorhinolaryngology, Complexo Hospitalario Universitario Lucus Augusti, Calle Dr Ulises Romero, 1, 27003 Lugo, Spain
| | - Andrés Soto-Varela
- Department of Otorhinolaryngology, Division of Neurotology, Complexo Hospitalario Universitario de Santiago de Compostela, Spain
- Department of Surgery and Medical-Surgical Specialities, Universidade de Santiago de Compostela, Travesía da Choupana, s/n, 15706 Santiago de Compostela, Spain
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McCormack A, Edmondson-Jones M, Mellor D, Dawes P, Munro KJ, Moore DR, Fortnum H. Association of dietary factors with presence and severity of tinnitus in a middle-aged UK population. PLoS One 2014; 9:e114711. [PMID: 25503070 PMCID: PMC4264778 DOI: 10.1371/journal.pone.0114711] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 11/12/2014] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE The impact of dietary factors on tinnitus has received limited research attention, despite being a considerable concern among people with tinnitus and clinicians. The objective was to examine the link between dietary factors and presence and severity of tinnitus. DESIGN This study used the UK Biobank resource, a large cross-sectional study of adults aged 40-69. 171,722 eligible participants were asked questions specific to tinnitus (defined as noises such as ringing or buzzing in the head or ears). Dietary factors included portions of fruit and vegetables per day, weekly fish consumption (oily and non-oily), bread type, cups of caffeinated coffee per day, and avoidance of dairy, eggs, wheat and sugar. We controlled for lifestyle, noise exposure, hearing, personality and comorbidity factors. RESULTS Persistent tinnitus, defined as present at least a lot of the time, was elevated with increased: (i) fruit/vegetable intake (OR = 1.01 per portion/day), (ii) bread (wholemeal/wholegrain, OR = 1.07; other bread, 1.20) and (iii) dairy avoidance (OR = 1.27). Persistent tinnitus was reduced with: (i) fish consumption (non-oily, OR = 0.91; oily, 0.95), (ii) egg avoidance (OR = 0.87) and (iii) caffeinated coffee consumption (OR = 0.99 per cup/day). Reports of “bothersome” tinnitus (moderate-severe handicap) reduced with wholemeal/wholegrain bread intake (OR = 0.86) [corrected].Reports of less frequent transient tinnitus increased with dairy avoidance (OR = 1.18) and decreased with caffeinated coffee (OR = 0.98 per cup/day) and brown bread (OR = 0.94). CONCLUSIONS This is the first population study to report the association between dietary factors and tinnitus. Although individually dietary associations are mostly modest, particular changes in diet, such as switching between foodstuffs, may result in stronger associations. These findings offer insights into possible dietary associations with tinnitus, and this may be useful when discussing management options in combination with other lifestyle changes and therapies.
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Affiliation(s)
- Abby McCormack
- NIHR Nottingham Hearing Biomedical Research Unit, Ropewalk House, 113 The Ropewalk, Nottingham, United Kingdom
- Otology and Hearing group, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, United Kingdom
- MRC Institute of Hearing Research, University Park, Nottingham, United Kingdom
| | - Mark Edmondson-Jones
- NIHR Nottingham Hearing Biomedical Research Unit, Ropewalk House, 113 The Ropewalk, Nottingham, United Kingdom
- Otology and Hearing group, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Duane Mellor
- School of Biosciences, University of Nottingham, Nottingham, United Kingdom
| | - Piers Dawes
- School of Psychological Sciences, University of Manchester, Manchester, United Kingdom
| | - Kevin J. Munro
- School of Psychological Sciences, University of Manchester, Manchester, United Kingdom
- Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Oxford Road, Manchester, United Kingdom
| | - David R. Moore
- Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Heather Fortnum
- NIHR Nottingham Hearing Biomedical Research Unit, Ropewalk House, 113 The Ropewalk, Nottingham, United Kingdom
- Otology and Hearing group, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, United Kingdom
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Selected Literature Watch. JOURNAL OF CAFFEINE RESEARCH 2014. [DOI: 10.1089/jcr.2014.1243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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12
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Selected Literature Watch. JOURNAL OF CAFFEINE RESEARCH 2014. [DOI: 10.1089/jcr.2014.1241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Glicksman JT, Curhan SG, Curhan GC. A prospective study of caffeine intake and risk of incident tinnitus. Am J Med 2014; 127:739-43. [PMID: 24608016 PMCID: PMC4127368 DOI: 10.1016/j.amjmed.2014.02.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 02/21/2014] [Accepted: 02/21/2014] [Indexed: 11/15/2022]
Abstract
BACKGROUND Caffeine is a commonly consumed substance that has been thought to play a role in the development of tinnitus, but prospective data are lacking. We prospectively evaluated the association between caffeine intake and self-reported tinnitus in a female cohort. METHODS Participants were 65,085 women in the Nurses' Health Study II, aged 30 to 44 years and without tinnitus at baseline in 1991, who completed questionnaires about lifestyle and medical history every 2 years and food frequency questionnaires every 4 years. Information on self-reported tinnitus and date of onset was obtained from the 2009 questionnaire, with cases defined as those reporting experiencing symptoms "a few days/week" or "daily." Multivariable adjusted hazard ratios were calculated using Cox proportional hazards regression models. RESULTS At baseline, the mean age of the cohort was 36.3 years and the mean caffeine intake was 242.3 mg/d. After 18 years of follow-up, 5289 incident cases of tinnitus were reported. There was a significant inverse association between caffeine intake and the incidence of tinnitus. Compared with women with caffeine intake less than 150 mg/d (150 mg corresponds to ∼ one 8-ounce cup of coffee), the multivariable adjusted hazard ratios were 0.85 (95% confidence interval, 0.76-0.95) for those who consumed 450 to 599 mg/d and 0.79 (0.68-0.91) for those who consumed 600 mg/d or more. CONCLUSIONS In this prospective study, higher caffeine intake was associated with a lower risk of incident tinnitus in women.
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Affiliation(s)
- Jordan T Glicksman
- Department of Otolaryngology-Head and Neck Surgery, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.
| | - Sharon G Curhan
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass
| | - Gary C Curhan
- Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Mass; Renal Division, Department of Medicine, Brigham and Women's Hospital, Boston, Mass; Department of Epidemiology, Harvard School of Public Health, Boston, Mass
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