Prevalence and natural history of primary speech and language delay: findings from a systematic review of the literature

    Authors

    J. Law; J. Boyle; F. Harris; A. Harkness;C. Nye

    Comments

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    Abbreviated Journal Title

    Int. J. Lang. Commun. Disord.

    Keywords

    primary speech and language delay; children; prevalence; natural; history; epidemiology; FOLLOW-UP; PHONOLOGICAL DISORDERS; PREDICTIVE-VALIDITY; IMPAIRED; CHILDREN; LATE TALKERS; AGE; DIFFICULTIES; INTELLIGENCE; RETARDATION; DISABILITY; Audiology & Speech-Language Pathology; Linguistics; Rehabilitation

    Abstract

    The prevalence and the natural history of primary speech and language delays were two of four domains covered in a systematic review of the literature related to screening for speech and language delay carried out for the NHS in the UK. The structure and process of the full literature review is introduced and criteria for inclusion in the two domains are specified. The resulting data set gave 16 prevalence estimates generated from 21 publications and 12 natural history studies generated from 18 publications. Results are summarized for six subdivisions of primary speech and language delays: (1) speech and/or language, (2) language only, (3) speech only, (4) expression with comprehension, (5) expression only and (6) comprehension only. Combination of the data suggests that both concurrent and predictive case definition can be problematic. Prediction improves if language is taken independently of speech and if expressive and receptive language are taken together. The results are discussed in terms of the need to develop a model of prevalence based on risk of subsequent difficulties.

    Journal Title

    International Journal of Language & Communication Disorders

    Volume

    35

    Issue/Number

    2

    Publication Date

    1-1-2000

    Document Type

    Article

    Language

    English

    First Page

    165

    Last Page

    188

    WOS Identifier

    WOS:000086492000001

    ISSN

    1368-2822

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