Who is affected by PDA?

Unlike autism and Asperger Syndrome, both of which seem to affect more boys than girls, PDA affects boys and girls equally. There are no prevalence rates for PDA as yet. It seems likely that the genetic factors are similar to those in autism and that about 6% of children with PDA are known to have a sibling with an autism spectrum disorder. As more diagnoses of PDA are made, prevalence figures will become more apparent.
 
PDA affects people from all backgrounds and nationalities.

>>What causes PDA?