Abstract
BACKGROUND: Acute and transient psychotic disorder (ATPD) is a distinct diagnostic category (F23) in ICD-10 which includes non-schizophrenic and non-affective psychoses following a transient course. The clinical features, diagnostic stability, and epidemiology of ATPD have not been adequately explored in the developing countries. The aim was to explore the socio-demographic and clinical characteristics of ATPD as well as examine the diagnostic stability and longitudinal revisions in the diagnosis of ATPD. MATERIAL AND METHODS: An observational retrospective study based on 10-year OPD records of ATPD patients was conducted in a tertiary health care center after ethics committee approval. A total of 120 patient records were analyzed for socio-demographic data, clinical symptoms, mental status examination findings, diagnosis on the first visit, and subsequent revisions in the diagnosis. RESULTS: The mean age of ATPD patients was 31.8 (±11.73) years. Delusion was the most common psychiatric symptom in ATPD patients followed by abnormal speech, hallucinations, and disorganized behavior. Antecedent psychosocial stressors were found in 44.2% cases. More than half of ATPD patients (51%) followed up after initial symptom remission and were diagnosed with chronic mental illnesses (schizophrenia or bipolar affective disorder). The ATPD patients experiencing a stressor at the onset of illness were less likely to develop chronic mental illness compared to the ones who did not have antecedent stressors. CONCLUSION: Irrespective of the genetic and phenomenological distinctiveness of ATPD, which has led to its inclusion as a separate diagnostic category in ICD-10, ATPD is an unstable diagnosis.