This newly published paper reviews epidemiological papers considering children with low language
Hill, E., Calder, S., Candy, C., Truscott, G., Kaur, J., Savage, B., & Reilly, S. (2023). Low language capacity in childhood: A systematic review of prevalence estimates. International Journal of Language & Communication Disorders. https://doi.org/10.1111/1460-6984.12944
Our paper that reports data from the Longitudinal Study of Australian Children (LSAC) was included in the analysis - and was rated as "high quality".
McLeod, S., & Harrison, L. J. (2009). Epidemiology of speech and language impairment in a nationally representative sample of 4- to 5-year-old children. Journal of Speech, Language, and Hearing Research, 52(5), 1213–1229. https://doi.org/10.1044/1092-4388(2009/08-0085)
