Rosa-Elena Ulloa1, Rogelio Apiquian2, Gamaliel Victoria3, Sofía Arce4, Natalia González5, Lino Palacios6. 1. Child Psychiatric Hospital Dr. Juan N Navarro, Mexico City, Mexico. Electronic address: eulloa@hotmail.com. 2. Arete Proyectos, Mexico City, Mexico; Universidad de las Américas, Mexico City, Mexico. 3. Arete Proyectos, Mexico City, Mexico. 4. Child Psychiatric Hospital Dr. Juan N Navarro, Mexico City, Mexico. 5. Centro Médico Imbanaco, Cali Colombia. 6. Instituto Nacional de Psiquiatría, Mexico City, Mexico.
Abstract
BACKGROUND: The Personal and Social Performance (PSP) scale is a widely used tool to evaluate adults with schizophrenia; however, more studies are needed regarding its usefulness in the assessment of adolescent patients, since the evaluation of their functioning could require adaptations according to development. OBJECTIVE: To examine construct validity, convergent validity, internal consistency and interrater reliability of the PSP in a sample of Mexican adolescents with schizophrenia. METHODS: A total of 40 patients with a DSM-IV diagnosis of schizophrenia or schizophreniform disorder were evaluated with PSP, CGAS, PANSS and the MATRICS battery. Construct and convergent validity were determined by the correlation between PSP with PANSS factors, MATRICS dimensions and CGAS. In addition, reliability was evaluated with Cronbach's alpha and intraclass correlation coefficients. RESULTS: PSP scores correlated with negative, excitement and cognitive factors of PANSS, CGAS as well as MATRICS domains. The PSP also showed high internal consistency and interrater reliability. CONCLUSIONS: The PSP is a valid and reliable instrument for the assessment of adolescent patients.
BACKGROUND: The Personal and Social Performance (PSP) scale is a widely used tool to evaluate adults with schizophrenia; however, more studies are needed regarding its usefulness in the assessment of adolescent patients, since the evaluation of their functioning could require adaptations according to development. OBJECTIVE: To examine construct validity, convergent validity, internal consistency and interrater reliability of the PSP in a sample of Mexican adolescents with schizophrenia. METHODS: A total of 40 patients with a DSM-IV diagnosis of schizophrenia or schizophreniform disorder were evaluated with PSP, CGAS, PANSS and the MATRICS battery. Construct and convergent validity were determined by the correlation between PSP with PANSS factors, MATRICS dimensions and CGAS. In addition, reliability was evaluated with Cronbach's alpha and intraclass correlation coefficients. RESULTS:PSP scores correlated with negative, excitement and cognitive factors of PANSS, CGAS as well as MATRICS domains. The PSP also showed high internal consistency and interrater reliability. CONCLUSIONS: The PSP is a valid and reliable instrument for the assessment of adolescent patients.