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Validation of the SPF-10: A new scale for assessing self-perceived functioning in schizophrenia. The VALFASS study
M Paz Garcia Portilla1, Pilar Sierra San Miguel2, Iluminada Corripio3
1Department of Psychiatry, University of Oviedo, Servicio de Psiquiatría Área Sanitaria de Oviedo, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Centro de Investigación Biomédica en red en salud Mental (CIBERSAM), INEUROPA, Oviedo, Spain.
Journal of Psychiatric Research
|July 9, 2026
Summary
The new 10-item Self-Perceived Functioning (SPF-10) scale effectively measures patient functioning in schizophrenia. Developed with patient input, it shows good psychometric properties and clinical applicability for personalized care.
Area of Science:
- Psychiatry and Mental Health
- Health Outcomes Research
- Psychometrics
Background:
- Existing patient-reported outcome measures for schizophrenia often lack patient input and routine feasibility.
- There is a need for instruments that capture the patient perspective on functioning comprehensively.
- The Self-Perceived Functioning (SPF-10) scale was developed to address these limitations.
Purpose of the Study:
- To evaluate the psychometric properties and clinical utility of the SPF-10 scale in assessing self-perceived functioning in individuals with schizophrenia.
- To assess the feasibility, reliability, validity, and discriminative ability of the SPF-10.
Main Methods:
- Cross-sectional, multicenter study involving 155 participants (schizophrenia patients and healthy controls).
- Exploratory factor analysis was used to determine the scale's structure.
- The SPF-10 was assessed for feasibility, internal consistency, construct validity (correlations with clinician ratings), and discriminative validity.
Main Results:
- The SPF-10 demonstrated excellent feasibility (100% response rate, 5-min completion time) and good internal consistency (Cronbach's α = 0.868).
- Factor analysis supported a two-dimensional structure: Personal and Social Relationships and Self-Care and Capabilities.
- The SPF-10 effectively discriminated between patients and controls (AUC = 0.888) and between different levels of functional impairment (AUC = 0.851), with good sensitivity and specificity.
Conclusions:
- The SPF-10 is a feasible, reliable, and valid patient-reported outcome measure for assessing self-perceived functioning in schizophrenia.
- Its patient-centered development and ability to capture unique aspects of functioning make it a valuable complementary tool for personalized assessment and care planning.
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