AOE has a lifetime incidence of 10%. The condition is known to affect people of all age groups but was found to peak in the 7- to 12-year-old age group and to decline in incidence among subjects >50 years of age. One review article estimated that AOE affects 4 in 1000 people annually in the US. In a study done in the UK, the 12-month prevalence of otitis externa was >1% and its prevalence was higher for females than for males up to the age of 65 years. In the same study, the incidence of otitis externa increased towards the end of the summer, especially in the youngest age group (5-19 years old). It is common in warmer temperatures and high-humidity conditions and after swimming.
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