Abstract
AIM: This study aimed to develop a concise tool with acceptable predictive properties to identify young children with specific language impairment (SLI). METHODS: In this nested case-control study children with SLI attending two special needs schools for severe speech and language difficulties in the Netherlands were matched by date of birth and sex with control children attending mainstream education. This study analysed the predictive validity for having SLI at a mean age of eight years and three months (range 4-11 years) using combinations of six language milestones that were registered at 24, 36 and 45 months and retrieved from the children's healthcare files in 2012. RESULTS: We included 253 pairs of children with and without SLI. During a single visit, combinations of two milestones at one age achieved a specificity of at least 97% and sensitivities ranged from 32% to 64%. However, the concise tool, which combined five milestones at three different ages - 24, 36 and 45 months - had a specificity of 96% (95% confidence interval 94-99%) and a sensitivity of 71% (95% confidence interval 66-77%). CONCLUSION: Combining milestones at different ages provided a concise tool that could help to detect children with SLI at a young age.