AIMS To develop and validate a short form of the 54-item Diabetes Medication System Rating Questionnaire that maintains the domains and performance characteristics of the long-form questionnaire. METHODS Data from the Diabetes Medication System Rating Questionnaire validation study were analysed to select items representing the nine scales (convenience, negative events, interference, self-mon...

In this review we discuss health measurement with a focus on psychometric methods and methodology. In particular, we examine some of the key issues currently facing the use of clinician and patient rating scales to measure the health outcomes of disease and treatment. We present three key facts and flag one crucial problem. First, the numbers generated by scales are increasingly used as the mea...