Reproducibility and validity of the Functional Communication Classification System for young children with cerebral palsy.

The FCCS has excellent interrater agreement and validity for communication classification of children with CP aged 2 or 3 years and is highly suitable for surveillance and research purposes. What this paper adds The Functional Communication Classification System (FCCS) is a valid instrument for children with cerebral palsy (CP) aged 2 or 3 years. Excellent agreement exists between speech-language pathologist and parent FCCS ratings. The FCCS has excellent correlation with intelligence, pragmatic function, and primary expressive mode. Stronger correlations with the Gross Motor Function Classification System and vision exist for children aged 2 or 3 years. Weaker correlations with manual ability exist when compared to older children with CP.