Table 1

 Age and gender of children in the different ASD datasets

DatasetNMedian ageRangeMinMaxM:F ratio
*All male.
Special Needs System2438.412.42.6157.1:1
Diagnosis dataset2687.312.52.5156.2:1
Learning Disability Community Team409.610.54.114.612.3:1
Lothian Autistic Society828.4112.913.96.5:1
Royal Hospital for Sick Children (hospital dataset)588.212.22.614.88.7:1
Speech and Language Therapy619.612.22.614.86.6:1
VTSS (school age children)99.296.513.8N/A*
Spectrum (preschool children)213.92.72.65.38.1:1
SureStart544.73.92.66.59.8:1