Prevalence of pervasive developmental disorder in Down's syndrome.
The frequencies of pervasive developmental disorder (PDD) in Down's syndrome (DS) have been reported from 1% to 11%. However, it is not clear if the frequency of this co-occurrence is higher or lower than in other mental retardations. We study a large sample of DS population, finding a PDD frequency of 15.6%, with 5.58% of autism (eight males and two females) and 10.05% of PDD non autism (nine males and nine females. The meaning of this frequency is discussed.
Lowenthal
Rosane
R
Paula
Cristiane S
CS
Schwartzman
Jose S
JS
Brunoni
Décio
D
Mercadante
Marcos Tomanik
MT
D000328:Adult; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000453:epidemiology*; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence