Acute and transient psychosis, with all its heterogeneous forms, represent a group of psychoses that are still under the process of crystallization, being distinct from the major’typical’ psychoses: schizophrenia and affective disorders.

The assessment of functional, socio-biographic and evolutive aspects in a sample of subjects diagnosed with acute and transient psychotic disorder compared to a sample with paranoid schizophrenia.

To highlight the significant differences between the two types of pathologies regarding functional, socio-demographic and evolutive aspects.

We have selected two samples comprising 41 subjects. The first sample included subjects diagnosed with Acute and Transient Psychotic Disorder (ATPD) and the other subjects with Paranoid Schizophrenia. We have assessed the following features: the age of onset, educational level, professional and marital status - at onset and after 5 years of evolution and the total number of hospital admissions during this period. Also, all of the subjects were evaluated at the end of the study with the Global Assessment of Functioning Scale.

We have found significant differences only regarding educational level and professional status at the end of the study. Also, there were significant differences in terms of the number of hospital admissions during the study period in sense of a favorable balance for those with ATPD diagnosis.

The differences between the two diagnosis samples are not as significant as implied by the types of pathologies analyzed. Functional and socio-biographic aspects remain insignificantly different between the two types of psychosis.