Validity and Reliability of the SF-36 Questionnaire in Patients on the Waiting List for a Kidney Transplant and Transplant PatientsGómez-Besteiro M.I. · Santiago-Pérez M.I. · Alonso-Hernández Á. · Valdés-Cañedo F. · Rebollo-Álvarez P.
Juan Canalejo Hospital, A Coruña, Spain
Background/Aims: The aim of this study is to explore the validity and reliability of the health-related quality of life SF-36 questionnaire in patients undergoing renal replacement therapy. Methods: A multicenter descriptive transversal study was carried out in Galicia, Spain, with patients undergoing renal replacement therapy. The tool used to measure the health-related quality of life was the authorized Spanish version of the ‘SF-36’ generic health questionnaire. The internal consistency of this survey was determined by means of interscale correlations and Cronbach’s α statistic. Validity was examined with a principal component exploratory factor analysis with Varimax rotation. Results: A total of 213 patients waiting for a kidney transplant and 72 recipients with a functioning renal transplant were studied. All the interscale correlations were positive and significant. The overall statistical value for Cronbach’s α was equal to 0.91 (95% CI: 0.91–0.94) and in all domains this value ranged from 0.7 to 0.92. The factor analysis identified 8 factors that explain 66.6% of the variance, 5 of which consisted of the same structure as 5 factors (domains) of the theoretical model. Conclusion: The SF-36 questionnaire is also a reliable and valid tool when used to measure the quality of life of patients undergoing renal replacement therapy.
© 2004 S. Karger AG, Basel
M. Inmaculada Gómez-Besteiro
SERGAS (Galician Health Service), Xerencia de Atención Primaria A Coruña
C/ General Sir John Moore, no 2, 2a Planta
ES–15001 A Coruña (Spain)
Tel. +34 981 21 91 02, Fax +34 981 21 91 14, E-Mail firstname.lastname@example.org
Received: May 6, 2004
Accepted: May 7, 2004
Published online: June 11, 2004
Number of Print Pages : 6
Number of Figures : 0, Number of Tables : 4, Number of References : 34
American Journal of Nephrology
Founded 1981 and edited until 2002 by S.G. Massry
Vol. 24, No. 3, Year 2004 (Cover Date: May-June 2004)
Journal Editor: G. Bakris, Chicago, Ill.
ISSN: 0250–8095 (print), 1421–9670 (Online)
For additional information: http://www.karger.com/ajn