... the study included nearly 38,000 people, with 2,961 cases of autism. The scientists found that women who were pregnant and who lived within a 2,000 meter radius of a highly sprayed area were anywhere from 10% to 16% more likely to have children diagnosed with autism than women who lived in places farther away from sprayed areas. [Source]
I wonder if they graphed the impact by distance and didn't simply use a 2,000 meter cutoff. In other words, how bad was the outcome for those living only 100 meters from it versus those living miles away.