Decreasing prevalence and severity of cerebral palsy in Norway among children born 1999 to 2010 concomitant with improvements in perinatal health

We observed a significant decrease in the prevalence and severity of CP subtypes and associated impairments among children with CP in Norway. This coincided with improvements in perinatal health indicators in the general population. These improvements are most likely explained by advancements in obstetric and neonatal care.