Does routine child health surveillance contribute to the early detection of children with pervasive developmental disorders? – An epidemiological study in Kent, U.K.

Table 2 Mean age at diagnosis

Diagnosis	Number of patients	Mean age at diagnosis	Range (years)
Childhood autism	6	3.13	2.75 – 3.50
Asperger's syndrome	3	7.22	5.75 – 9.25
Autistic spectrum disorder	12	5.37	3.33 – 9.42

Table 2 shows the mean age at diagnosis and the range of age at which the diagnosis was made according to diagnostic subgroups.

ISSN: 1471-2431