For example, a relatively small 2007 study of 5,484 eight-year-old children in Finland found 2.9 children per 1,000 met the ICD-10 criteria for an AS diagnosis, 2.7 per 1,000 for Gillberg and Gillberg criteria, 2.5 for DSM-IV, 1.6 for Szatmari et al., and 4.3 per 1,000 for the union of the four criteria.
For eksempel fandt en relativt lille undersøgelse fra 2007 af 5484 otte-årige børn i Finland, at 2,9 børn per 1000 opfyldte ICD-10 kriterierne for en Aspergers syndrom diagnose, 2,7 per 1.000 for Gillberg og Gillberg kriterier, 2,5 for DSM-IV, 1.6 for Szatmári et al., og 4,3 per 1.000 for kombinationen af de fire kriterier.