Constructing an item bank using item response theory: the amc linear disability score project

摘要: Patient relevant outcomes, such as cognitive functioning and functional status, measured using questionnaires, have become important endpoints in medical studies. Traditionally, responses to individual items are simply summed obtain a score for each patient. Recently, there has been interest another paradigm, item response theory (IRT), proposed an alternative scores. The benefits of the use IRT greatest, when it is used conjunction with calibrated bank. This collection items, which presented large groups patients, whose estimate measurement properties items. article examines methodology surrounding construct calibrate bank uses AMC Linear Disability Score project, aims develop measure status expressed by ability perform activities daily life, illustration.