Adaptation and psychometric properties of the Anxiety Symptoms Questionnaire for Brazil/Adaptacao e propriedades psicometricas do Questionario de Sintomas de Ansiedade para o Brasil

The present study aimed to adapt the Anxiety Symptoms Questionnaire and analyze its psychometric properties for the Brazilian population. The adaptation was conducted in six stages: translation, synthesis, back translation, expert analysis, evaluation by the target population, and a pilot study. A total of 441 adults (M = 35.36; SD = 11.08 years) were interviewed, with 301 classified as healthy, 105 as having anxiety, and 35 as having depression. The Anxiety Symptoms Questionnaire results demonstrated evidence of content validity, exhibiting high internal consistency (Cronbach's alpha = 0.975 and McDonald's omega = 0.976). Moreover, the questionnaire showed evidence of criterion validity by effectively distinguishing between groups with and without anxiety (F(2.438) = 22.647; p < 0.01), as well as convergent validity with the structured clinical interview for DSM-5 ([rho] = 0.70, p < 0.01), and correlations with anxiety ([rho] = 0.62, p < 0.01), depression ([rho] = 0.64, p < 0.01), and stress ([rho] = 0.70, p < 0.01) scores from another instrument. The Anxiety Symptoms Questionnaire is valid and reliable for use by healthcare professionals in the Brazilian population. O presente estudo teve como objetivo adaptar o Questionario de Sintomas de Ansiedade e analisar suas propriedades psicometricas para a populacao brasileira. Os resultados do Questionario de Sintomas de Ansiedade demonstraram evidencias de validade de conteudo, alta consistencia interna (alfa de Cronbach = 0,975 e omega de McDonald = 0,976), evidencias de validade de criterio ao diferenciar grupos com e sem ansiedade (F(2,438) = 22,647; p = < 0,01), validade convergente com a entrevista estruturada do DSM-5 ([rho] = 0,70 e p < 0,01) e com o escore de ansiedade ([rho] = 0,62 e p < 0,01), depressao ([rho] = 0,64 e p < 0,01) e estresse ([rho] = 0,70 e p < 0,01) de outro instrumento.