Tinnitus in Aging Individuals

Pathophysiological Mechanisms

Age-related hearing loss (presbycusis) is the most common type of sensorineural hearing loss in adults, typically beginning after age 50 and increasing in prevalence with age, according to the American Academy of Otolaryngology-Head and Neck Surgery 2
The primary mechanism of presbycusis appears to be degeneration of hair cells, particularly starting at the basal turn of the cochlea, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 1
Mitochondrial dysfunction associated with reactive oxygen species and apoptosis has been proposed as a mechanism for age-related hearing loss, which contributes to tinnitus, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 3, 4

Genetic predisposition accounts for approximately half of the variance in age-related hearing loss, according to the American Academy of Otolaryngology-Head and Neck Surgery 3, 4
Specific genetic polymorphisms (rs10955255 and rs1981361) may be risk factors for age-related hearing loss across various racial groups, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 4
Chronic medical conditions, such as hypertension, diabetes, and hypercholesterolemia, significantly increase the risk of hearing loss, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 3, 4
Adults with diabetes have twice the prevalence of hearing loss compared to those without diabetes, according to the American Academy of Otolaryngology-Head and Neck Surgery 4
Smoking and passive smoke exposure have deleterious effects on hearing, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 3, 4

Men experience more rapid increases in high-frequency hearing loss with aging compared to women, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 5
Estrogen may have a protective effect against hearing loss development and progression in women, according to the American Academy of Otolaryngology-Head and Neck Surgery 6
African Americans have a lower risk of age-related hearing loss compared to white and Hispanic populations, possibly due to protective effects of melanin expression in the stria vascularis, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 6

Hearing loss is associated with a 50% increase in depression compared to normal-hearing adults, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 3, 4
Among community-dwelling older adults, depression is reported in 69% of hearing-impaired individuals versus 31% of non-hearing-impaired individuals, according to the American Academy of Otolaryngology-Head and Neck Surgery 4
Social isolation related to hearing loss has been linked with decreased physical activity in older adults, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 4