740 million people in the world live with tinnitus.
Jarach and colleagues from several European universities conducted an umbrella review, as well as a traditional systematic review and meta-analysis, to estimate the global prevalence and incidence of tinnitus, severe tinnitus, chronic tinnitus, and diagnosed tinnitus.
The research team calculated that the pooled prevalence estimate of any tinnitus among adults was 14.4%; it ranged from 4.1% to 37.2% in the studies. The prevalence did not differ significantly based on the questions asked, whether patients had experienced tinnitus"for more than 5 minutes" or"during the last months." The pooled prevalence also did not differ significantly by sex; it was about 14.1% among men and 13.1% among women.
The prevalence in adults appeared to differ significantly by continent, ranging from 5.2% in Africa to about 14% in Europe and North America and 21.9% in South America. However, the presence of tinnitus did not differ based on per-capita gross domestic product tertiles. The pooled prevalence of severe tinnitus was 2.7% for children and adolescents, 0.4% for adults age 18 to 44 years, 2.7% for age 45 to 64 years, and 6.9% for age 65 years and older. The pooled prevalence was 2.3% for men and 2.7% for women.
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