Slightly fewer babies are born with autism in Wisconsin than in the rest of the nation, but the reason for the difference remains unclear.
A study released Thursday by U.S. health officials found evidence of autism in 5.2 per 1,000 Wisconsin children born in 1994, compared to an average of 6.6 cases per 1,000 children born in 13 other states tracked for the study.
Scientists also found that autism rates in Dane County were more than twice those in Milwaukee County, according to Maureen Durkin, an epidemiologist at the University of Wisconsin-Madison.