[hobbes1]

The study results are based on analysis of high-density genotyping data collected from 1,000 individuals with autism spectrum disorder (ASD) and 1,300 without ASD. These findings further support an emerging consensus within the scientific community that autism is caused in part by many "rare variants," or genetic changes found in less than one percent of the population.

Thats odd...Less than 1%? So...how do you get from there to 1 in 166 ?

[Pharmboy]

It’s biology, so it’s inexact. They’re within an order of magnitude, so that’s pretty good...

[Myrddin]

Thats odd...Less than 1%? So...how do you get from there to 1 in 166 ?

1 in 100 would be 1%. 1 in 200 would be 0.5%. 1 in 166 is 0.6%. That is less than 1%. When you have a population of 300 million, that translates to 1.8 million people.