[Changes of hallucination and delusion: the results of the 21-33 year follow-up of "Budapest 2000"].

Unlabelled: In view of the fact that there are only a few longitudinal follow-up examinations in patients with major mental illness, data on the changes of hallucination and delusion over the lifetime of the patient are extremely limited.

Aim: The purpose of this study was to investigate the long-term course of delusions and hallucinations in patients with psychotic disorders.

Method: 221 patients were evaluated in this study.