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 consent and 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 a first 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 daily or at least 3 times per week for at least one hour per occasion ; * Never having taken a neuroleptic treatment with antipsychotic aim (except for an antipsychotic treatment started for the current episode for example by the general practitioner before being referred to psychiatry); * A disorder meeting the DSM 5 criteria from the following list: delusional disorder, brief psychotic disorder greater than 7 days, schizophreniform disorder, schizophrenia, schizoaffective disorder, substance-induced psychotic disorder greater than 7 days, other specific or nonspecific schizophrenic spectrum disorder or other psychotic disorder, bipolar I or II disorder with congruent and non-mood congruent psychotic features, bipolar disorder with congruent and non-mood congruent psychotic features induced by a substance, major depressive disorder with congruent and non-mood congruent psychotic features. * Inclusion should be within the first 3 months of care for first episode psychosis in the psychiatric service. * At the time of inclusion, the psychotic symptomatology observed during the first episode psychosis may still be present or in remission. Exclusion Criteria: * The subject is participating in another category I interventional study, or is in a period 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 by a medication of other medical condition * The patient is pregnant or breastfeeding