Psychometric properties of the Brazilian Portuguese version of the Obsessive-Compulsive Inventory – Revised (OCI-R) Propriedades psicométricas da versão em português do Brasil da Obsessive-Compulsive Inventory – Revised (OCI-R)

Objective: The present study was designed to evaluate the psychometric properties of the Brazilian Portuguese version of the ObsessiveCompulsive Inventory – Revised. Method: The Obsessive-Compulsive Inventory – Revised was administered toa total of 260 participants: a clinical sample of 130 patients with anxiety disorders (64 with a diagnosis of obsessive-compulsive disorder patients, 33 diagnosed with social phobia, and 33 with panic disorder) and a sample of 130 non-clinical subjects. Results: The findings indicate that the Obsessive-Compulsive Inventory – Revised is a valid measure for identifying and assessing the severity of the six symptom subtypes in obsessive-compulsive disorder. The original factor structure of the instrument was replicated in an exploratory factor analysis. Test-retest reliability was examined using data from 64 obsessive-compulsive disorder patients who completed the inventory on two different occasions. In each sample, the overall and subscale scores showed moderate to good internal consistency, good convergent and divergent validity, and sensitivity to changes resulting from cognitivebehavioral group therapy changes. Conclusion: Our findings indicate that the Brazilian Portuguese version of the Obsessive-Compulsive Inventory – Revised retains the psychometric properties of its original version and the Spanish, German and Iceland versions. Descriptors: Obsessive-compulsive disorder; Evaluation; Symptoms; Anxiety disorders; Brazil Submitted: February 9, 2010 Accepted: May 12, 201 0 Resumo Objetivo: O presente estudo foi delineado para avaliar as propriedades psicométricas da versão em português do Brasil do Obsessive-Compulsive Inventory – Revised. Método: O Obsessive-Compulsive Inventory – Revised foi aplicado em um total de 260 indivíduos: em uma amostra clínica de 130 pacientes (64 pacientes com transtorno obsessivo-compulsivo, 33 pacientes com fobia social e 33 pacientes com transtorno do pânico) mais uma amostra não clínica de 130 sujeitos. Resultados: Os resultados indicam que o Obsessive-Compulsive Inventory – Revised é uma medida válida para identificar e avaliar a severidade dos seis subtipos de sintomas do transtorno obsessivo-compulsivo. A estrutura fatorial do instrumento foi replicada em uma análise fatorial exploratória. A confiabilidade teste-reteste foi examinada usando os dados de 64 pacientes com transtorno obsessivo-compulsivo que completaram o inventário em dois momentos diferentes. Em cada amostra, os escores total e das subescalas mostraram consistência interna de boa a moderada, boa validade concorrente e discriminante, e sensibilidade para as mudanças da terapia cognitivo-comportamental em grupo. Conclusão: Nossos achados indicam que a versão para o português do Brasil do ObsessiveCompulsive Inventory – Revised manteve as propriedades psicométricas da versão original e das versões em espanhol, alemão e islandês. Descritores: Transtorno obsessivo-compulsivo; Avaliação; Sintomas; Transtornos de ansiedade; Brasil Revista Brasileira de Psiquiatria Introduction Obsessive-compulsive disorder (OCD) is characterized by repetitive behaviors that develop as attempts to relieve the anxiety provoked by intrusive and persistent thoughts. Patients may present one or more OCD symptoms at the same time (for instance, concerns about contamination and washing) and several studies have reported the importance of condensing these symptoms into specific subgroups. In addition, the intensity of symptoms may vary within each subtype. One measure that has been designed to correspond with the symptom-based structural model of OCD is the ObsessiveCompulsive Inventory Revised (OCI-R), an 18-item selfreport instrument which is a revised and shortened version of the Obsessive-Compulsive Inventory (OCI). The18 items of the shortened version are rated on a five-point Likert Scale that supplies scores on six subscales, and it offers improvements over the first version in three aspects: (1) it eliminates the redundant scale