Association between the duration of untreated psychosis and short- and long-term outcome in schizophrenia within the Northern Finland 1966 Birth Cohort

Regarding early outcome, long DUP may be a modest marker and proxy measure of a more severe clinical phenotype. The divergent results of earlier studies and the association between long DUP and better long-term outcome in our study, indicate that the length of DUP does not necessarily predict poor outcome in long-term follow-up. This may also be due to methodical difficulties, e.g. insufficient power and residual confounding linked to long follow-up studies.