Relationship Between Subjective Experiences and Psychopathological Dimensions in Schizophrenia

Abstract

Subjective experiences are subtle, self-experienced disturbances, a thorough description of which is provided within the framework of the concept of basic symptoms. Recent studies have shown that subjective experiences have important diagnostic implications for schizophrenia and related disorders. The purpose of the present study was to examine the relationship between subjective experiences and psychopathological dimensions in schizophrenia. Sixty-seven outpatients with schizophrenia were evaluated. Subjective experiences were comprehensively assessed using the Frankfurt Complaint Questionnaire (FCQ). Symptoms of schizophrenia were evaluated using the Manchester Scale (MS). Pearson's partial correlation analysis was performed between the FCQ and the MS scores, controlling for the influence of extrapyramidal adverse effects. The analysis revealed that the MS positive symptom score had significant positive correlations with the FCQ total score and subscales scores. The MS negative symptom score did not have significant correlations with the FCQ scores. The results of our study suggest that subjective experiences are significantly associated with positive symptomatology in schizophrenia, suggesting that they may share a common underlying neural basis. Future prospective studies are necessary to confirm the stability of these relationships and to explore the diagnostic and therapeutic implications of subjective experiences in a diverse group of patients at different stages of illness.