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The Prevalence of Tinnitus with Normal Human Aging: A Population-based Cross-sectio- nal Study. (Abstract of ARO Meeting Denver, Colorado) SungHee Kim1,2, Jong Heon Shin1, Hyung Jun Shim1, Soo Chan Park1, Dae Keun Song1, Soon Suck Jarng3, Jung Ki Lee4 1Department of Otorhinolaryngology, Daegu Fatima Hospital, 2Daegu Fatima Hospital, 3Department of Information Control & Instrumentation Engineering, Chosun University, 4Health Promotion Center, Daegu Fatima Hospital

The natural history and prevalence of tinnitus is still not clear. As both aging and hearing loss are the most important factors for the tinnitus, the prevalence of the tinnitus with aging may provide useful infor- mation to clarify the natural history of tinnitus. We tried to assess the clinical characteristics of tinnitus in healthy population. The subjects were the clients who visited Health Promotion Center of Daegu Fatima Hospital from January 2004 to September 2005 and voluntarily completed hearing questionnaire. We excluded subjects (1) who had past history of ear drainage, usage of known ototoxic drug, such as chemotherapeutic agent, parenteral antibiotics for serious illness such as tuberculosis, and parenteral diuretics, head injury, working in noise environment, attending military service, (2) who tested twice during the period, (3) who aged less than 20 year-old, and (4) who showed asymmetric hearing loss in the pure tone averages (more than 16 dB average diffe- rence of 0.5, 1, and 2 kHz). Finally, 1150 subjects were included. They were 219 men (20 to 78.3 year- old, mean age 48) and 913 women (20 to 83.9 year-old, mean age 46.3). Multivariate logistic analysis was used to evaluate the difference between male and female and the effect of aging and hearing loss. There was no significant difference in gender. Even though the prevalence of tinnitus increased with age, it was not statistically significant. Only the hearing threshold was the factor to affect the presence of tinni- tus. The prevalence was increased with hearing threshold, 9.5%, 11.3%, 19.2%, and 40.6% for less than 20dB, 30dB, 40dB and 50 dB by pure tone average of 0.5, 1, 2, and 4 kHz, respectively. Bilateral tinnitus was most common as 62.7%. Remains complained unilateral tinnitus, 22.5 and 14.8% for the right and the left, respectively. According to population based subjects without any significant causes of sensori- neural hearing loss, roughly 10% of normal hearing subjects complained tinnitus and it was bilateral in most.

XI Review

Tinnitus. J Laryngol Otol. 2007 Mar;121(3):201-208. McFerran DJ, Phillips JS Department of Otolaryngology and Head and Neck Surgery, Essex County Hospital, Colchester, UK.

Chronic idiopathic subjective tinnitus is a common condition affecting around one in ten of the population at any given time. For the majority of people it is an annoyance rather than a major health issue but for approximately 0.5 per cent of the population tinnitus interferes with their ability to pursue a normal life. Modern theories of the pathogenesis of the condition concentrate on the central auditory system alt- hough the peripheral auditory system can be a trigger or ignition site for tinnitus. Although a cure remains elusive there are several good treatment strategies based on psychological and neurophysiological mo- dels of tinnitus that promote habituation to the symptom.

XII Holistic

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