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Persistent Negative Symptoms (PNS) affect real-world functioning already at the onset of schizophrenia. Longitudinal studies on beneficial effects of psychosocial treatments for PNS in First Episode Schizophrenia (FES) are still relatively scarce. The aim of the current study was to evaluate the longitudinal persistence of PNS in young FES individuals treated according to the multimodal “Early Intervention in Psychosis” (EIP) program over a 2-year follow-up period. 133 FES subjects (aged 12–35 years) were recruited within the Italian EIP program and completed the Positive And Negative Syndrome Scale (PANSS) and the Global Assessment of Functioning (GAF). In accordance with the PNS criteria, we dichotomized FES individuals with and without PNS. In the FES group with PNS, a multiple linear regression analysis was conducted to examine relevant associations between longitudinal PNS levels and the specialized treatment components of our EIP protocol. Twenty (15%) FES participants met the PNS criteria. At baseline, PNS levels had relevant positive correlations with functioning decline and PANSS total score. At the end, the 2-years follow-up period, FES subjects with PNS showed a significant decrease in PNS levels. In our linear regression analysis, this reduction was associated with a higher number of individual psychotherapy and case management sessions delivered during our follow-up (together with a shorter DUP [Duration of Untreated Psychosis]). PNS are clinically relevant in a minority of FES individuals. Our results suggest that patient-tailored psychosocial interventions can reduce clinical severity of PNS over a 2-year period.

Longitudinal persistence of negative symptoms in young individuals with first episode schizophrenia: a 24-month multi-modal program follow-up