Please use this identifier to cite or link to this item: https://repositorio.unifesp.br/handle/11600/45398
Title: The Portuguese version of the clinical global impression - Schizophrenia scale: validation study
Other Titles: Versão em português da Impressão Clínica Global - Escala de Esquizofrenia: estudo de validação
Authors: Lima, Mauricio Silva de [UNIFESP]
Soares, Bernardo Garcia de Oliveira [UNIFESP]
Paoliello, Gilda
Vieira, Rodrigo Machado
Martins, Claudio Meneghello
Mota Neto, Joaquim Ignacio da
Ferrão, Ygor Arzeno
Schirmer, Douglas Allen
Volpe, Fernando Madalena [UNIFESP]
Univ Fed Pelotas
Eli Lilly & Co
Universidade Federal de São Paulo (UNIFESP)
Hosp Espirita Porto Alegre
Keywords: schizophrenia
psychiatric status rating scales
validity of tests
validation studies
multicenter study
Issue Date: 1-Sep-2007
Publisher: Assoc Brasileira Psiquiatria
Citation: Revista Brasileira De Psiquiatria. Sao Paulo: Assoc Brasileira Psiquiatria, v. 29, n. 3, p. 246-249, 2007.
Abstract: Objectives: The Clinical Global Impression - Schizophrenia Scale was designed to assess severity and treatment response in subjects with schizophrenia involved in naturalistic studies and daily clinical practice. The objective of this study is to validate the Portuguese version of the Clinical Global Impression - Schizophrenia Scale in Brazil by assessing its psychometric properties. Method: Cross-sectional validation study of the Portuguese version of the Clinical Global Impression - Schizophrenia Scale, tested in outpatients and inpatients with schizophrenia (DSM-IV, ICD-10) from 6 centers in Brazil. Concurrent validity and sensitivity to change were assessed by comparison with the Positive and Negative Syndrome Scale, which is considered the gold standard tool to evaluate patients with schizophrenia. Interrater reliability was evaluated by intraclass correlation coefficients (ICC) calculated based on the scoring of two concomitant raters. Results: 70 inpatients and 70 outpatients were evaluated. Total Clinical Global Impression - Schizophrenia Scale and Positive and Negative Syndrome Scale scores were highly correlated (r = 0.79; p < 0.01). Positive (r = 0.86), negative (r = 0.79), depressive (r = 0.66) and cognitive (r = 0.75) symptoms subscale scores were also correlated between both scales (P < 0.01). Sensitivity to change was significantly correlated between the Clinical Global Impression - Schizophrenia Scale and Positive and Negative Syndrome Scale (r = 0.73; p < 0.01). Interrater reliability was substantial for positive symptoms and total scores of the Clinical Global Impression - Schizophrenia Scale (ICC = 0.81 and 0.73), and moderate for negative, depressive, and cognitive symptoms score (0.64, 0.67 and 0.63, respectively). Conclusions: The Brazilian version of the Clinical Global Impression - Schizophrenia Scale is a valid and reliable instrument for the assessment of severity and treatment response in schizophrenic inpatient and outpatients.
URI: http://repositorio.unifesp.br/11600/45398
ISSN: 1516-4446
Other Identifiers: http://dx.doi.org/10.1590/S1516-44462006005000047
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