Assessment of ingestive and oral praxis skills: children with cerebral palsy vs. controls

Eating impairments (dysphagia) in children with cerebral palsy (CP) have been well documented. However, individual components of ingestion, such as the feeding skills of eating and drinking and their relationship to oral-motor planning skills (praxis), remain largely undetermined. The purpose of the present study was to examine functional feeding and oral praxis skills in a group of children with CP and mild eating impairment and to compare their skills with a group of age-matched controls. As well, interobserver reliabilities and concurrent validity of these tests were examined to determine their reliability and to what extent they may be measuring similar constructs. Twenty-seven children with CP and 21 age-matched controls, aged 4.0-16 years, participated in this study. Two oral praxis tests (OFMF and OPT) and two standard ingestive skills tests (GVA and FFAm) were administered to each child. Children with CP scored consistently and significantly lower on the OFMF than controls (p < 0.001); similar results were achieved on the OPT (p < 0.001). Children with CP had difficulty with items where there was a high demand for repetition and smooth sequencing. On the ingestive skills tests children with CP took significantly longer for chewing a hard solid food texture than controls (p < 0.001), and functional feeding skills were also significantly poorer than in controls. Interrater reliability coefficients for the OPT and OFMF were excellent (all ICCs > 0.90). There was high concurrent validity between the OPT and OFMF (r = 0.90, p < 0.0001). The correlations for the FFAm and GVA tests were somewhat weaker (r = -0.54, p < 0. 0001). Correlations were negative; as functional feeding scores increased (improved), chewing time decreased (improved). Excellent reliable and valid assessment instruments are available to the practicing clinician. They cover a wide range of oral-motor performance and, so, must be used judiciously and for the purpose that they have been developed.