Method: The DUP of all patients meeting criteria for first episode psychosis was measured 1993-1994 and from 1997 to 2010 in a naturalistic long-term study. DUP values of all patients were included, irrespective of patients' participation in a clinical follow-up study, yielding a highly representative sample.
Results: DUP varied across studies with differing information campaign intensity and content. These variations will be described and explored.
Conclusions: Early detection campaigns should have a stable focus and high intensity level. Future research should further elucidate pathways to care in order to establish principal targets for information campaigns.