RESUMO
Objective@#To retrospectively review the characteristics of preschool children with speech and language disorders to determine their clinical features and compares the average degrees of language delay based on hospital visit purposes, language developmental delay causes, and maternal language. @*Methods@#One thousand one hundred two children (832 males, 270 females) with the chief complaint of language or speech problems who underwent language assessment for the first time were included. Their medical records, including demographic data, language environments, and family history of language problems and other developmental problems, were collected. Furthermore, the results of language and developmental assessments and hearing tests were collected. @*Results@#Among the children enrolled in this study, 24% had parental problems and 9% were nurtured by their grandparents. The average degree of language delay did not differ regarding purposes of hospital visits. The average degree of language delay was greatest in children with autism spectrum disorders and least in children with mixed receptive–expressive language disorders. In children with mothers who do not speak Korean as their native language, social quotients in the social maturity scale were less than 70. @*Conclusion@#Language environment is an essential factor that may cause speech and language disorders. Moreover, maternal language seems to affect the social quotient of the social maturity scale.