Psychometric properties and cross-cultural comparison of the cognitive complaints in bipolar disorder rating assessment (COBRA) in Mexican patients with bipolar disorder

Bipolar Disorder (BD) is a serious and frequent mental health condition that is sometimes fatal. Several longitudinal studies have found an important correlation between cognition and functionality in BD. Despite the known importance of cognitive symptoms in BD, evaluation of cognitive deficits is not routinely done in clinical settings, as assessment is time-consuming and requires neuropsychological testing. The aim was to evaluate the psychometric properties of the subjective cognitive deficits in bipolar disorder (COBRA) rating scale in a Mexican sample of patients with BD and perform a cross-cultural comparison with the results obtained in other cultures. Ninety-two Healthy Subjects and 80 euthymic patients with BD were asked to complete the COBRA rating scale. The psychometric properties found in Mexican population show a good internal consistency and good discriminant validity with control subjects. Adequate congruence coefficients were obtained between the COBRA analyses in Mexican population and Spanish population and acceptable when compared to Japanese population. The COBRA scale is a brief and valid measure of cognitive complaints in BD for use in Mexican population.