Health and Quality of Life Outcomes BioMed Central Research Open Access Classical test theory

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Health and Quality of Life Outcomes BioMed Central Research Open Access Classical test theory versus Rasch analysis for quality of life questionnaire reduction Luis Prieto*1, Jordi Alonso2 and Rosa Lamarca2 Address: 1Health Outcomes Research Unit. Eli Lilly and Company, Madrid, Spain and 2Health Services Research Unit. Institut Municipal d'Investigació Mèdica (IMIM). C/ Dr. Aiguader, 80; 08003 Barcelona, Spain Email: Luis Prieto* - prieto_luis@lilly.com; Jordi Alonso - jalonso@imim.es; Rosa Lamarca - rlamarca@imim.es * Corresponding author Published: 28 July 2003 Health and Quality of Life Outcomes 2003, 1:27 This article is available from: http://www.hqlo.com/content/1/1/27 Received: 11 April 2003 Accepted: 28 July 2003 © 2003 Prieto et al; licensee BioMed Central Ltd....

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