Table 3: Sensitivity and specificity of the autism spectrum disorder measures.

Sensitivity (%)Specificity (%)

18 monthsM-CHAT10072.8
ADOS-T10093

24 monthsM-CHAT10083.7
ADOS-T10095.8
ADI-T100100

36 monthsSCQ0100

Note. MCHAT: Modified Checklist for Autism in Toddlers, ADOS: Autism Diagnostic Observation Schedule, and ADI-R: Autism Diagnostic Interview-Revised.