Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí hóa học quốc tế đề tài : Measuring the ICF components of impairment, activity limitation and participation restriction: an item analysis using classical test theory and item response theory | Health and Quality of Life Outcomes BioMed Central Research Measuring the ICF components of impairment activity limitation and participation restriction an item analysis using classical test theory and item response theory Beth Pollard 1 Diane Dixon2 Paul Dieppe3 and Marie Johnston1 Open Access Address 1School of Psychology University of Aberdeen Aberdeen AB24 2UB UK 2Department of Psychology University of Stirling Stirling FK9 4LA UK and 3Peninsula College of Medicine and Dentistry University of Plymouth Plymouth PL4 8AA UK Email Beth Pollard - Diane Dixon - Paul Dieppe - Marie Johnston - Corresponding author Published 7 May 2009 Received 10 November 2008 Health and Quality of Life Outcomes 2009 7 41 doi 1477-7525-7-41 Accepted 7 May 2009 This article is available from http content 7 1 41 2009 Pollard et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background The International Classification of Functioning Disability and Health ICF proposes three main health outcomes Impairment I Activity Limitation A and Participation Restriction P but good measures of these constructs are needed The aim of this study was to use both Classical Test Theory CTT and Item Response Theory IRT methods to carry out an item analysis to improve measurement of these three components in patients having joint replacement surgery mainly for osteoarthritis OA . Methods A geographical cohort of patients about to undergo lower limb joint replacement was invited to participate. Five hundred and twenty four patients completed ICF items that had been previously identified as measuring only a single ICF construct in patients with .
