A revised short version of the depression questionnaire

Abstract

Combined use of confirmatory factor analysis and simple logistic models together with observations drawn from clinical experience constitutes a valid method for shortening a questionnaire while at the same time maintaining, if not improving, its psychometric properties. The QD-R, seems adequate to how much is required in rehabilitation to point out the outcome, in case of variation of depression, easily to fill in by the debilitated individual or elderly, mainly because some item excessively influenced by the pathology or the hospital context were removed.