What is the prevalence of tinnitus worldwide? As audiologists, the answer to this question may be something that we are interested in knowing. Unfortunately, a recent systematic review, conducted by McCormack et al (2016), suggests that it may not be an easy question to answer.
These authors, who used the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines (Moher et al. and the PRISMA Group, 2009), searched for research studies in five electronic databases to answer this question, as well as determine the prevalence of “bothersome” tinnitus worldwide. They also sought to explore reasons for differences in prevalence across studies. The authors limited their search to studies that met the following criteria:
- Conducted between the dates of January 1, 1980, and July 1, 2015 (when their search was conducted)
- Had subjects 18 years of age or older
- Were not limited to a restricted set of the population (e.g., those with certain types of exposures)
- Was not a case-control study
Based on their extensive review of 39 studies (reported in 40 articles) determined to meet the aforementioned criteria, the authors found wide prevalence ranges for both tinnitus, in general, and “bothersome” tinnitus, specifically.
“Overall tinnitus prevalence figures for each study ranged from 5.1% (Quaranta, Assennato, and Sallustio, 1996) to 42.7% (Gibrin, Melo, and Marchiori, 2013). Tinnitus severity was assessed in 16 studies. The prevalence of bothersome tinnitus ranged from 3.0% (Michikawa, Nishiwaki, Kikuchi, Saito, Mizurati, Okamato, and Takebayashi, 2010) to 30.9% (Kim, Lee, An, Sim, Park, Kim, Lee, Hong, and Choi, 2015). Even comparing those studies that used the most common type of tinnitus question (‘tinnitus lasting for more than five minutes at a time’), the prevalence figures reported for current tinnitus vary widely from 11.9% (Fuiji, Nagata, Nakamura, Kawachi, Takatsuka, Oba, and Shimizu, 2011) to 30.3% (Sindhusake, Mitchell, Newall, Golding, Rochtchina, and Rubin, 2003).”
The authors also noted differences in prevalence based on both age and sex. In general, prevalence increased with age up to about age 70 years and was greater in males versus females. The findings regarding bothersome tinnitus, however, were mixed regarding sex.
McCormack and colleagues (2016) note several problems with determining the prevalence numbers worldwide. The problems include: (1) lack of a universal definition for both tinnitus and bothersome tinnitus and distinguishing between the two; (2) differences between studies in terms of how age groups were reported; (3) geographic bias; and (4) moderate to high reporting bias in the majority of the studies. Unfortunately, the prevalence of tinnitus remains unclear. To address this, the authors call for standardization in future research when it comes to (1) tinnitus definitions and how it is assessed, and (2) reporting formats.
Readers can access the article here.
Fujii K, Nagata C, Nakamura K, Kawachi T, Takatsuka N, Oba S, Shimizu H. (2011) Prevalence of tinnitus in community-dwelling Japanese adults. Journal of Epidemiology 21(4):299–304.
Gibrin P, Melo J, Marchiori L. (2013) Prevalence of tinnitus complaints and probable association with hearing loss, diabetes, Mellitus and hypertension in elderly. CoDAS. 25(2):176–180.
Kim H, Lee H, An S, Sim S, Park B, Kim S, Lee J, Hong S, Choi H. (2015) Analysis of the prevalence and associated risk factors of tinnitus in adults. PLoS ONE. 10(5):e0127578.
McCormak A, Edmondson-Jones M, Somerset S, Hall D. (2016) A systematic review of the reporting of tinnitus prevalence and severity. Hearing Research 337:70-79.
Michikawa T, Nishiwaki Y, Kikuchi Y, Saito H, Mizurati K, Okamato M, Takebayashi T. (2010) Prevalence and factors associated with tinnitus: a community-based study of Japanese Elders. Journal of Epidemiology 20(4):271–276.
Moher D, Liberati A, Tetzlaff J, Altman D, the PRISMA Group. (2009). Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Annals of Internal Medicine 151(4):264–269.
Quaranta A, Assennato G, Sallustio V. (1996) Epidemiology of hearing problems among adults in Italy. Scandinavian Audiology Supplementum 42:9–13.
Sindhusake D, Mitchell P, Newall P, Golding M, Rochtchina E, Rubin G. (2003) Prevalence and characteristics of tinnitus in older adults: the Blue Mountains Hearing Study. International Journal of Audiology 42(5):289–294.
Do you remember why Joseph Sauveur is important to our profession? If you do, you could have done better than a recent contestant on the legendary gameshow, Jeopardy. The question posed was: “Born hearing-impaired in 1653, Joseph Sauveur studied sound vibrations and coined this word for the science he pioneered.” While I was impressed that…
Sudden sensorineural hearing loss (SSNHL) can occur with or without symptoms of vertigo/vestibular dysfunction. In a recent study, investigators sought to determine the contribution of audiogram classification when evaluating vestibular dysfunction in those with SSNHL. A total of 50 subjects who had experienced SSNHL were divided into two groups, one without vertiginous symptoms and one…
This past year was full of news reports regarding hospitalizations and death rates related to COVID-19, both here in the United States and abroad. As such, one might wonder what impact this disease has had on life expectancy. Wolf, Masters, and Aaron (2021) estimated life expectancy in the United States, and 16 other democracies, for…