Validation of the Spanish Personal and Social Performance scale (PSP) in outpatients with stable and unstable schizophrenia.

Abstract Introduction The main long-term therapeutic goals of schizophrenia should go beyond the symptoms and include the improvement of patients’ psychosocial functioning and quality of life. The aim of this study was to validate the Personal and Social Performance (PSP) scale in Spanish outpatients with schizophrenia. Materials and methods Naturalistic, 6-month follow-up, multicentre study. 244 patients and 76 controls were evaluated using the PSP, the Social and Occupational Functioning Assessment Scale (SOFAS), and the Clinical Global Impression–Severity (CGI-S) and Change (CGI-C) scales. Results Internal reliability = 0.87. Test-retest reliability = 0.98. Construct validity = 1 component that explained 73.2% of the variance. Convergent validity: Pearson correlation coefficient between PSP and SOFAS= 0.95 (p Conclusion The Spanish PSP is a reliable, valid and sensitive instrument for measuring functioning in outpatients with schizophrenia. As a brief, clinician-rated instrument, the PSP scale seems to be appropriate for use in everyday clinical practice as a mean of identifying and monitoring changes in patient's functioning.