the prevalence at school age of cerebral palsy and severe education subnormality in children of low birthweight ( less than or equal to 4 lb=1814 g ) born to residents in the region served by the south east thames regional health authority in the early 1970s was compared with that in children of the same birthweight born in 1950-53 .
C0024032
subnormality
C0005612
birthweight