Many people are very concerned about the huge increase in autism diagnoses. But it is fair to ask about how autism compares with other neurological disorders. A recent study looked at the prevalence of autism, attention deficit hyperactivity disorder, obsessive-compulsive disorder and Tourette syndrome in Denmark, Finland, Sweden and Western Australia. This research demonstrated that each of these disorders are also increasing rapidly. You can read about it here. It is an interesting study that really puts things into perspective.
