Introduction: Persistent Negative Symptoms (PNS) criteria include the presence of prominent negative symptoms (NS), functional impairment, presence of NS during stability periods and its persistence for at least six months. PNS seems to be associated with male gender, long duration of untreated psychosis (DUP), neurocognitive impairments and presence of traumatic life events. Objectives: Study the prevalence of PNS in first-episode psychosis patients (FEP). Describe the association between PNS and gender, age-at-onset in FEP, DUP, functional level, positive symptoms, depressive symptoms, antipsychotic drugs doses and childhood traumatic experiences. Methods: Longitudinal study. Drug-naive FEP patients with NS at the moment of inclusion and maintained at six-month follow-up from Parc Sanitari Sant Joan de Déu were included. Sociodemographic variables, the Positive and Negative Syndrome Scale (PANSS), the Calgary Depression Scale for Schizophrenia (CDS), the Personal and Social Performance scale (PSP) and Childhood Trauma Questionnaire subscales (CTQ) were administered at sixmonth follow-up. Results: A total of 42 patients (64,3% men and 35,7% women) were included. 47,6% met criteria for PNS. Male gender (p=0,01) and worse PSP score (p=0,02) were associated with PNS. Same variables were found to be associated using the regression analysis. Sexual abuse subscale of CTQ was inversly associated with PNS (p=0,03). Conclusions: As it is found in other publications, worse functional results and male gender seem to be associated with PNS. Controversial results for CTQ are found, maybe due to limited N in our sample, which is the main limitation of the study. Therefore, further studies are needed to improve the conceptualization of SNP. [ABSTRACT FROM AUTHOR]