Diagnostic distribution of self-disorders in help-seeking adolescents: an early faeature of the schizophrenia spectrum

Self-disorders (SD) have been considered as a core feature of schizophrenia in both classical and recent psychopathological literature. However, the specificity of SD to the schizophrenia spectrum has mainly been tested in adult samples, with studies in adolescents being scarce. Thus, the aims of this study were: 1) to examine the specificity of SD to the schizophrenia spectrum in a help-seeking adolescent sample; 2) to explore the correlations between SD and social and role functioning. One hundred 13-18-year-old inpatients underwent a comprehensive psychopathological examination. SD were assessed using the Examination of Anomalous Self-Experiences (EASE), and social and role functioning were assessed using the Global Functioning: Social (GF:S) and Role (GF:R) scales. The diagnostic distribution of the EASE scores was tested using Mann–Whitney U test, the correlations between the EASE scores and the GF:S and GF:R scores were tested using Spearman's ρ. EASE scores were significantly higher in schizophrenia spectrum disorders than in other spectrum disorders, whereas in schizophrenia spectrum psychoses and schizotypal personalities did not differ. Furthermore, higher EASE scores significantly correlated with lower GF:S and GF:R scores. This findings confirm the validity of SD as an experiential vulnerability phenotype of the schizophrenia spectrum, even in adolescents.