title: A discussion of item response theory and its applications in health status assessment.
authors.affiliation: Center on Outcomes Research and Education, Evanston Northwestern Healthcare, Illinois 60201, USA. d-cella@nwu.edu
authors.forename: D
authors.initials: D
authors.lastname: Cella
authors.forename: C H
authors.initials: CH
authors.lastname: Chang
mesh_terms: D000203:Activities of Daily Living; D003625:Data Collection / Q000379:methods; D006305:Health Status Indicators; D006801:Humans; D015233:Models, Statistical; D011788:Quality of Life; D011795:Surveys and Questionnaires