Editorial: Health conscious already knew environment played a major role.
Environmental factors are more important than previously thought in leading to autism, as big a factor as genes, according to the largest analysis to date to look at how the brain disorder runs in families.
Sven Sandin, who worked on the study at King’s College London and Sweden’s Karolinska institute, said it was prompted “by a very basic question which parents often ask: ‘If I have a child with autism, what is the risk my next child will too?'”
The findings, published in the Journal of the American Medical Association (JAMA), suggest heritability is only half the story, with the other 50 percent explained by environmental factors such as birth complications, socio-economic status, or parental health and lifestyle.