Abstract
Objective: The nosological entity of acute and transient psychotic disorders (ATPD) as an independent diagnostic category has become a subject of controversial opinions. The present study aimed to follow-up the diagnostic stability of index episode of ATPD and to examine the influence of clinical and socio-demographic factors on the ATPD prognosis. Method: A sample of 153 (60.1% females; mean age 27.8 ± 8.2) first-admitted patients with ATPD was followed over 2 years. The clinical manifestations, global functioning and quality of life were regularly evaluated during follow-up period. Results: At the end of follow-up, the overall stability rate of ATPD, excluding the cases not readmitted until last assessment, reached 34%. The diagnostic transition was observed in 35.9% of the patients, mostly to schizophrenia and schizoaffective disorders. There was a significant deterioration in several clinical and social indicators among the patients who developed schizophrenia, compared with those with stable ATPD, whereas no reliable predictors were found for diagnostic transition to schizophrenia, except younger age, unmarried status and period of the first hospitalization. Conclusion: A sizeable proportion of the patients with initial diagnosis of ATPD is likely to represent early manifestations of schizophrenia-related disorders. In agreement with some previous observations, our study indicates a lack of strong rationale for separating ATPD from other psychotic disorders within the ICD-10 F2 category.
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