Trends in prevalence, demographic characteristics and subtypes of children with cerebral palsy, 1991–2010.

* Trend is not significant when restricted to 1993–2010 surveillance
^ Total includes children with spastic-dyskinetic and spastic-ataxic CP, and spastic CP not otherwise specified.
~ Proportions and prevalence estimates with numerators <5 children are suppressed due to small sample sizes. Trend analyses reflect weighted prevalence for surveillance years with n<5 children and the subsequent surveillance year (e.g., trend for Hispanic children with CP combined 1991–1992 numerators and denominators for the first time period).
** Includes ataxic, dyskinetic, hypotonic, and ataxic-dyskinetic CP subtypes.
+Includes children with CP not otherwise specified.
Trends in prevalence, demographic characteristics and subtypes of children with cerebral palsy, 1991–2010.