Brief Psychotic Disorder (BPD), defined according to the DSM-5 by the presence of delusions and/or hallucinations and/or disorganised speech persisting for at least one day and less than one month, the disturbance not being due to a bipolar disorder or a schizophrenia spectrum disorder or to the effect of a substance. Classically, the prognosis of a BPD is considered to be divided between restitution ad integrum (30%), progression to bipolar disorder (30%), progression to schizophrenia (30%) or repetition of the same form (10%).

The objectives of our study were to evaluate the evolutionary modalities after the first hospitalization for BPD after a follow-up of at least one year and to compare them with the data in the literature.

Our study was retrospective and descriptive. We reviewed the records of patients hospitalised in our department from 1 January 2014 to 31 December 2018 for a first BPD and assessed the subsequent course over a minimum period of one year.

We included 70 records of patients hospitalized. Twenty-five patients (35.71%) were lost to follow-up after their first hospitalisation. The remaining patients (64.29%) were divided into 3 groups according to the above-mentioned evolutionary modalities (recovery, recurrence of BPD, progression to schizophrenia, progression to bipolarity). Results were in favour of an evolution towards bipolar disorder (35.55%), towards schizophrenia (44.44%), a relapse of the BPD (4.44%), while 13.33% of the BPDs had no future after an aftercare of at least one year. In addition, one case of evolution towards a chronic delusional disorder of the persecution type was observed.

In the present study, our results tend to be in line with the law of one-third described by some authors despite a slight discrepancy partly explained by the limitations of our study. Although, the outcome of BPD remains unpredictable. The minimum five years of evolution are decisive in assessing the subsequent prognosis.

None Declared