Introduction: Diagnosis stability and clinical course of functional psychoses are complex phenomena and represent an important aspect for clinical practice and research. Diagnosis stability is the degree to which a diagnosis remains constant between a baseline and a follow-up subjects assessments.
Material and method: This work is part of a project developed in Timisoara Psychiatric Clinic (PTTEP) starting with 1985 and is a longitudinal study of functional psychosis. Subjects (59) were selected based on inclusion criteria. The following parameters were analyzed: socio-demographic characteristics of each subject, the average duration of evolution, diagnosis of the first episode of psychosis and diagnosis after 5 and 10 years of evolution.
Results: Sample study analysis shows that most subjects have changed their diagnosis after a period of between 5 to 8 years after the first episode of psychosis. Usually, after a period of about 10 years since the first episode of psychosis the diagnosis remains stable with the appearance of the same kind of episodes. It can be noticed that the most stable diagnosis was of delusional disorder followed by schizophrenia. On the opposite side – the most unstable diagnosis was of acute and transient psychotic disorder.
Conclusion: The clinical diagnosis changes during the first 5 to 7 years of evolution after the first episode of psychosis and becomes stable after about 10 years.