Evaluation of the Impact of Case Manager Intervention on the 3-year Psychotic Episode Recurrence Rate in Patients Aged 16 to 30 Years with a First Psychotic Episode.

Inclusion Criteria:

• The patient or their close relative must have given their free and informed consentand signed the consent form

• The patient must be a member or beneficiary of a health insurance plan

• The patient is available for a 3-year follow-up.

• Patient is managed in a psychiatric service (consultation or hospitalization) for afirst episode psychosis defined by:

• Presence of positive psychotic symptoms (delusion(s) and/or hallucination(s)and/or conceptual disorganization) evolving for at least one week, either dailyor at least 3 times per week for at least one hour per occasion ;

• Never having taken a neuroleptic treatment with antipsychotic aim (except foran antipsychotic treatment started for the current episode for example by thegeneral practitioner before being referred to psychiatry);

• A disorder meeting the DSM 5 criteria from the following list: delusionaldisorder, brief psychotic disorder greater than 7 days, schizophreniformdisorder, schizophrenia, schizoaffective disorder, substance-induced psychoticdisorder greater than 7 days, other specific or nonspecific schizophrenicspectrum disorder or other psychotic disorder, bipolar I or II disorder withcongruent and non-mood congruent psychotic features, bipolar disorder withcongruent and non-mood congruent psychotic features induced by a substance,major depressive disorder with congruent and non-mood congruent psychoticfeatures.

• Inclusion should be within the first 3 months of care for first episode psychosis inthe psychiatric service.

• At the time of inclusion, the psychotic symptomatology observed during the firstepisode psychosis may still be present or in remission.

Exclusion Criteria:

• The subject is participating in another category I interventional study, or is in aperiod of exclusion determined by a previous study

• The subject, or one of the parents for minor patients, refuses to sign the consent

• It is impossible to give the subject informed information

• The patient is under safeguard of justice or state guardianship

• The patients has an IQ less than or equal to 55

• The patient has a first psychotic episode linked to a psychotic problem triggered bya medication of other medical condition

• The patient is pregnant or breastfeeding