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Autism linked to 3rd trimester pollution exposure

posted by Jason Kottke   Dec 19, 2014

A major study conducted by the Harvard School of Public Health has found a significant link between autism and the exposure of the mother to high levels of air pollution during the third trimester of pregnancy.

Researchers focused on 1,767 children born from 1990 to 2002, including 245 diagnosed with autism. The design of the study and the results rule out many confounding measures that can create a bias, Weisskopf said. The researchers took into account socioeconomic factors that can influence exposure to pollution or play a role in whether a child is diagnosed with autism.

The fact that pollution caused problems only during pregnancy strengthened the findings, since it’s unlikely other factors would have changed markedly before or after those nine months, he said in a telephone interview.

The ultimate cause of autism remains a mystery in most cases, said Charis Eng, chairwoman of the Lerner Research Institute’s Genomic Medicine Institute at the Cleveland Clinic in Ohio. While the Harvard study isn’t definitive and the findings could be coincidental, it’s not likely given the large size and the precise results, she said in a telephone interview.

“The truth is there has to be gene and environmental interactions,” said Eng, who wasn’t involved in the study. “I suspect the fetus already had the weak autism spectrum disorder genes, and then the genes and the environment interacted.”

It would be a huge help (and I am not in any way being facetious about this) if Jenny McCarthy and all the other celebrity “vaccines cause autism” folks threw their weight behind cleaning up pollution the way they attacked vaccination. Redeem yourselves. (via @john_overholt)