Am I missing something?
Maybe.
Today, a syndicated article from USA Today is making the rounds. It reports on a study that seems to indicate that having babies closely together raises the risk of autism. It also reports on a few other risk factors: prematurity, being born to older parents, and congenital rubella syndrome.
I wish I could find something other than mainstream news to understand this better. The article quotes Thomas Insel, director of the NIH as saying that autism rates now are 10 times higher than they were a couple of decades ago. It is believed that only 25% of that increase is due to changes in the ways that diagnosis is made. That leaves me wondering how this huge increase can be accounted for by having babies closely together and older parents having babies, two situations which were certainly common in pre-contraception days. As for congenital rubella syndrome, it seems that this, too, would have been at least as common, if not more so, decades ago before there were innoculations against German Measles.
So, what do I think? I think that perhaps it's true that the risk factors studied might indeed play a role in a child developing autism, but I more strongly believe that there's got to be more to this story as these risk factors do nothing to explain the rising rates of autism.
Reporting on and reading reports of scientific studies is a tricky business because it's easy to take such reports at face value and difficult to know when they're truly adding to our knowledge base.