Psychometric properties of a new treatment expectation scale in rheumatoid arthritis: an application of item response theory

摘要

BackgroundPatient-generated health outcome measures are important in the assessment of long-term treatment goals for Rheumatoid Arthritis (RA), but few psychometrically sound measures are available. The MAPLe-RA (>Measuring >Actual >Patient->Led >expectations in RA) is a new questionnaire and its psychometric properties are not investigated. This study aims to examine these properties for each of the items using Item Response Theory (IRT) .