RESUMEN
BACKGROUND: Psychiatric disorders often emerge during adolescence or young adulthood, leading to significant disability among youth. The transition from Child and Adolescent Mental Health Services (CAMHS) to Adult Mental Health Services (AMHS) is critical for individuals experiencing emerging psychopathology, with delayed access to care negatively impacting long-term outcomes. Accessing mental health services for adolescents and young adults is often complex and delayed due to challenges in service visibility, accessibility and appropriateness. METHODS: This study examines the care trajectories of individuals consecutively accessing the early detection and intervention (EDI) centre C'JAAD (Evaluation Centre for Young Adults and Adolescents) in Paris (France) over the year 2021. The main goal was to clarify the role of this EDI centre in the continuity of care and transition to AMHS. Data about their history of care, hospitalisations and referral sources were collected retrospectively. RESULTS: The sample comprised 194 individuals, with 57.2% males and a median age of 20 years. Most patients (67.5%) were ≥18 years old upon arrival, with 31% in a situation of not being in education, employment, or training (NEET). Over one-third (35.2%) had prior psychiatric hospitalisations. Patients were mainly referred to our EDI centre from other hospital departments (42.3%). Regarding care in CAMHS, 50.3% of the total sample had medical follow-up during childhood, of whom 41.9% had discontinued care upon arrival at the EDI centre. The median onset age of care in CAMHS was 14, with a median duration of 12 months. Adult patients experienced an approximately 3-year gap between the end of CAMHS care and assessment at the EDI centre. DISCUSSION: The sample's characteristics resemble those of other EDI centres, but concerns persist regarding referral timing and the NEET status of many youths. Lack of prior medical follow-up and challenges in transitioning to AMHS underscore the need to enhance care continuity and address difficulties in accessing care during the transition to adulthood.
RESUMEN
BACKGROUND: Quantitative electroencephalography (EEG) analysis offers the opportunity to study high-level cognitive processes across psychiatric disorders. In particular, EEG microstates translate the temporal dynamics of neuronal networks throughout the brain. Their alteration may reflect transdiagnostic anomalies in neurophysiological functions that are impaired in mood, psychosis, and autism spectrum disorders, such as sensorimotor integration, speech, sleep, and sense of self. The main questions this study aims to answer are as follows: 1) Are EEG microstate anomalies associated with clinical and functional prognosis, both in resting conditions and during sleep, across psychiatric disorders? 2) Are EEG microstate anomalies associated with differences in sensorimotor integration, speech, sense of self, and sleep? 3) Can the dynamic of EEG microstates be modulated by a non-drug intervention such as light hypnosis? METHODS: This prospective cohort will include a population of adolescents and young adults, aged 15 to 30 years old, with ultra-high-risk of psychosis (UHR), first-episode psychosis (FEP), schizophrenia (SCZ), autism spectrum disorder (ASD), and major depressive disorder (MDD), as well as healthy controls (CTRL) (N = 21 × 6), who will be assessed at baseline and after one year of follow-up. Participants will undergo deep phenotyping based on psychopathology, neuropsychological assessments, 64-channel EEG recordings, and biological sampling at the two timepoints. At baseline, the EEG recording will also be coupled to a sensorimotor task and a recording of the characteristics of their speech (prosody and turn-taking), a one-night polysomnography, a self-reference effect task in virtual reality (only in UHR, FEP, and CTRL). An interventional ancillary study will involve only healthy controls, in order to assess whether light hypnosis can modify the EEG microstate architecture in a direction opposite to what is seen in disease. DISCUSSION: This transdiagnostic longitudinal case-control study will provide a multimodal neurophysiological assessment of clinical dimensions (sensorimotor integration, speech, sleep, and sense of self) that are disrupted across mood, psychosis, and autism spectrum disorders. It will further test the relevance of EEG microstates as dimensional functional biomarkers. TRIAL REGISTRATION: ClinicalTrials.gov Identifier NCT06045897.