IN A STUDY of multiple anomalies in school-age children we had occasion to make two surveys, four years apart, of the population in a school for the deaf. An interesting change was noted in the reported causes of deafness between the 1960-1961 and the 1964-1965 sessions. Particularly striking was the reversal in importance of acquired and congenital nonhereditary causes seemingly compatible with known trends in medical management of those postnatal, perinatal, and prenatal factors believed to be operative as causes of hearing impairment.
Materials and Methods
Identical criteria were used in both studies,1 in which the children were divided into three groups (Table 1). All children in whom there had been reported an illness or accident which resulted or might have resulted in deafness were included in the category of "acquired deafness" (type 1). Those children in whom known accidents of pregnancy or labor might have caused impaired hearing were
Danish JM, Levitan M. Changing Aspects of Deafness in School-Age Children. Arch Otolaryngol. 1967;86(2):166–171. doi:10.1001/archotol.1967.00760050168009
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