We describe the cognitive profile in a complete national cohort of children with cerebral palsy (CP). One hundred and twentyseven Icelandic children (67 females, 60 males) with CP, born between 1985 and 2000 and assessed between the ages of 4 and 6 years 6 months (mean age 5y 5mo, SD 6mo), were included in the study. IQ was measured using the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) and developmental quotient (DQ) was obtained using various developmental scales. Physiological classification of CP in the children was: spasticity, n=104 (82%); dyskinesia, n=14 (11%); ataxia, n=six (4.7%), and unclassified CP, n=3 (2.3%). Spastic diplegia was the most prevalent subtype (35%) followed by hemiplegia and quadriplegia. Forty-five per cent of the group were at Level I of the Gross Motor Function Classification System, 32% were at Levels II and III, and 23% were at Levels IV and V. Sixty per cent of the children had an IQ or DQ >70. Median scores on the WPPSI were Full-scale IQ 84, Verbal IQ (VIQ) 92, and Performance IQ (PIQ) 77. Children with spastic diplegia and quadriplegia had a significantly lower PIQ than VIQ. Of the children who failed to complete the WPPSI, 20% had DQ >85. Thus, cognitive skills can be masked by limitations of movement and motor control in children with CP.

AIM To describe behavioural and emotional symptoms among Icelandic preschool children with cerebral palsy (CP).METHOD Children with congenital CP, assessed with the Child Behavior Checklist ⁄ 1½-5 (CBCL ⁄ 1½-5) and Caregiver-Teacher Report Form (C-TRF), were enrolled in the study. A comparison group was recruited from the general population. Thirty-six children (53% males) with CP were assessed at a mean age of 4 years 11 months (SD 5mo, range 4-6y); 26 (72%) had bilateral distribution of symptoms and 32 (89%) had spastic CP. Thirty (83%) were at Gross Motor Function Classification System levels I or II and six at levels III or IV. For comparison, 110 (43% males) and 120 (48% males) children were assessed with the CBCL ⁄ 1½-5 and the C-TRF respectively, at a mean age of 4 years 6 months (SD 6mo, range 4-6y).RESULTS Sixteen children (48%) with CP had high scores on total problems scale of the CBCL ⁄ 1½-5 and 20 (65%) on the C-TRF compared with 18% of the comparison group, both on the CBCL ⁄ 1½-5 and the C-TRF (p<0.001). Children with CP had higher scores on all subscales of the CBCL ⁄ 1½-5 and the C-TRF, except somatic complaints. Attention difficulties, withdrawn, aggressive behaviour, and anxious ⁄ depressed symptoms were most pronounced among children with CP.INTERPRETATION A large proportion of preschool children with CP have substantial behavioural and emotional difficulties, which need to be addressed in their treatment.Cerebral palsy (CP) is the most common motor impairment of childhood. It is caused by a lesion of the brain occurring early in development. CP frequently affects behaviour and emotional well-being of children, most likely as a result of complex interactions between biological factors in the brain and psychosocial surroundings.

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