As I’ve pointed out, Kirby has messed up his maths on the Huffington post blog. He’s now done much the same in an Atlanta Journal-Constitution article (clearly, their Editor does not check for mathematical errors, or general stupid). Kirby’s article is titled “Give us answers on vaccines”: I don’t expect any answers from Kirby, but correct sums would be a start.
Kirby argues that:
Most striking is how typical Hannah’s cellular dysfunction [mitochondrial disorder] may be among children with autism. While extremely rare in the general population, at two per 10,000 people, it seems unusually common in autism — with estimates up to 2,000 per 10,000.
To go over these figures again – a 2,000 per 10,000 incidence of mitochondrial disorder among people with ASDs is and incidence of 1/5. If 1/5 people with an ASD has mitochondrial disorder, and only 2/10,000 people have mitochondrial order, then if everyone with mitochondrial disorder has an ASD only 1/1,000 people would have an ASD. Clearly, not everyone with mitochondrial disorder has an ASD, so the actual incidence that Kirby is estimating would be considerably lower.
Age of Autism linked the blog post on Kirby’s article, and there are (at time of writing) over 170 comments. Oddly, though, it seems that no-one has picked up on Kirby’s basic error. Haven’t they noticed their hero’s issues with maths? Or don’t they care?