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Item response theory was used to shorten EORTC QLQ-C30 scales for use in palliative care.
Petersen MA, Groenvold M, Aaronson N, Blazeby J, Brandberg Y, de Graeff A, Fayers P, Hammerlid E, Sprangers M, Velikova G, Bjorner JB; European Organisation for Research and Treatment of Cancer Quality of Life Group. Petersen MA, et al. Among authors: fayers p. J Clin Epidemiol. 2006 Jan;59(1):36-44. doi: 10.1016/j.jclinepi.2005.04.010. Epub 2005 Sep 12. J Clin Epidemiol. 2006. PMID: 16360559
A simulation study provided sample size guidance for differential item functioning (DIF) studies using short scales.
Scott NW, Fayers PM, Aaronson NK, Bottomley A, de Graeff A, Groenvold M, Gundy C, Koller M, Petersen MA, Sprangers MA; EORTC Quality of Life Group; Quality of Life Cross-Cultural Meta-Analysis Group. Scott NW, et al. J Clin Epidemiol. 2009 Mar;62(3):288-95. doi: 10.1016/j.jclinepi.2008.06.003. Epub 2008 Sep 6. J Clin Epidemiol. 2009. PMID: 18774693
Comparing translations of the EORTC QLQ-C30 using differential item functioning analyses.
Scott NW, Fayers PM, Bottomley A, Aaronson NK, de Graeff A, Groenvold M, Koller M, Petersen MA, Sprangers MA; EORTC and the Quality of Life Cross-Cultural Meta-Analysis Group. Scott NW, et al. Among authors: fayers pm. Qual Life Res. 2006 Aug;15(6):1103-15; discussion 1117-20. doi: 10.1007/s11136-006-0040-x. Qual Life Res. 2006. PMID: 16900290
Development of computerised adaptive testing (CAT) for the EORTC QLQ-C30 dimensions - general approach and initial results for physical functioning.
Petersen MA, Groenvold M, Aaronson NK, Chie WC, Conroy T, Costantini A, Fayers P, Helbostad J, Holzner B, Kaasa S, Singer S, Velikova G, Young T; EORTC Quality of Life Group. Petersen MA, et al. Among authors: fayers p. Eur J Cancer. 2010 May;46(8):1352-8. doi: 10.1016/j.ejca.2010.02.011. Epub 2010 Mar 16. Eur J Cancer. 2010. PMID: 20231085
269 results