Danish and Australian researchers find, in a review of the Danish Psychiatric Central Research Register, that the incidence rate of early-onset schizophrenia diagnoses has increased significantly in the period from 1971 to 2010, and that the higher incidence of the diagnosis in males seen earlier in the period has reversed. The authors draw no conclusions as to whether the changes over the time period reflect changes in the diagnostic system, increased awareness of early psychosis, or changes in the actual incidence of the disorder.
Okkels, N., Jensen, S., McGrath, J., Nielsen, R. "Changes in the Diagnosed Incidence of Early Onset Schizophrenia Over Four Decades." Acta Psychiatrica Scandinavica, online August 20, 2012
Incidence of early-onset schizophrenia ‘increasing’