Scoliosis in children with severe cerebral palsy: a population-based study of 206 children at GMFCS levels III-V.

PURPOSE: To evaluate the prevalence of scoliosis and the rate of scoliosis progression in children with severe cerebral palsy (CP) at GMFCS levels III-V.

METHODS

Two hundred and six children (86 girls, 120 boys), born 2002-2008, were recruited from The Norwegian Quality and Surveillance Registry for Cerebral Palsy (NorCP). Inclusion criteria were bilateral CP and GMFCS levels III-V. Scoliosis was evaluated annually by examination of the spine by a physiotherapist. Radiographic examination was performed in children with moderate or severe scoliosis at clinical evaluation. The Cobb angle was used as a measure of curve magnitude.

RESULTS

Scoliosis, defined as Cobb angle ≥ 10°, occurred in 121 children (59%). Severe scoliosis (Cobb angle ≥ 40°) developed in 80 of the 206 patients (39%) at a mean age of 10.9 years (range 5-16) and was more prevalent in children at GMFCS level V (62%) than at levels IV (19%) and III (6%). Initial Cobb angle, Cobb angle ≥ 30° at age 10 years, and GMFCS level V were independent risk factors for severe scoliosis. In children at GMFCS level V, the rate of scoliosis progression decreased with age from a mean of 9.7° per year at age 3-5 years to 2-3° per year in children ≥ 11 years.

CONCLUSIONS

The prevalence of scoliosis among children with CP increased with decreasing motor functional level. The most important risk factors for progression of scoliosis were high initial Cobb angle, Cobb angle ≥ 30° at age 10 years, and GMFCS level V.