Organic Food Causes Autism (r=9971; p=0.0001)

not found by me, but by jasonp55 - it is impressive, it is unambiguous, it is clearer than the fact that storks deliver babies (p=0.008)

I think respondent Doorsofperceptron has a point when s/he says:

I think they're related.

Both diagnosing autism and buying organic food indicate movement to a society rich enough to concern itself with secondary health issues.

No one believes that autism or eating inorganic food will kill you, but diagnosing autism and developing coping strategies or eating organic food, are seen as good ways to improve people's lifestyle.

Not only have you found a real correlation in American history, but I think if you checked countries all around the world, the percentage of food sold labelled as organic should strongly correlation with the proportion of the population diagnosed as autistic.

Basically, autism testing and organic food are proxies that measure how rich people are.

In any case, this little graph shows impressively that correlation ≠ causation. An important thing to keep in mind when the usual anti-vaccine activists make vaccines responsible for autism and infant deaths.

sources: http://www.ota.com/pics/documents/2011OrganicIndustrySurvey.pdf
http://penndata.hbg.psu.edu/documents/ADR/Idea06.pdf