Abstract
In order to clarify the factors influencing the prognosis of otitis media with effusion in children, we correlated the duration of middle ear effusions with five items: sex, age, laterality, the area of the mastoid air cells and the hearing level of air conduction. We examined 317 ears of 250 children with otitis media with effusion. Each ear was decided to have improved or not improved on the basis of tympanometric findings. No significant difference was found between the two sexes. Younger children showed less improvement than older ones, and those with bilateral involvement had poorer results than those with unilateral otitis media. No correlation was found between the area of mastoid air cells and the duration of effusion. Ears with severe hearing impairment were less apt to recover. It was concluded that age, laterality and the hearing level at the first visit can be used as prognostic factors in this disease.
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