Editor—The recent collaborative publication on the epidemiology of cerebral palsy, incorporating data from three cerebral palsy registers, categorises levels of functional disability to reflect difficulties with ambulation, manual dexterity, and learning.1

We agree that “...severity of disability needs to be recorded...” to facilitate comprehensive monitoring and rational planning, but a measure of how such disability affects the life of a child would further improve our understanding.

The North of England Cerebral Palsy Register contains data on children born between 1960 and …