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Differential item functioning (DIF) in the EORTC QLQ-C30: a comparison of baseline, on-treatment and off-treatment data.
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 and the Quality of Life Cross-Cultural Meta-Analysis Group. Scott NW, et al. Among authors: bottomley a. Qual Life Res. 2009 Apr;18(3):381-8. doi: 10.1007/s11136-009-9453-7. Epub 2009 Feb 27. Qual Life Res. 2009. PMID: 19247808
The practical impact of differential item functioning analyses in a health-related quality of life instrument.
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. Among authors: bottomley a. Qual Life Res. 2009 Oct;18(8):1125-30. doi: 10.1007/s11136-009-9521-z. Epub 2009 Aug 4. Qual Life Res. 2009. PMID: 19653125
Interpretation of differential item functioning analyses using external review.
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. Among authors: bottomley a. Expert Rev Pharmacoecon Outcomes Res. 2010 Jun;10(3):253-8. doi: 10.1586/erp.10.22. Expert Rev Pharmacoecon Outcomes Res. 2010. PMID: 20545590 Review.
Differential item functioning (DIF) analyses of health-related quality of life instruments using logistic regression.
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 and the Quality of Life Cross-Cultural Meta-Analysis Group. Scott NW, et al. Among authors: bottomley a. Health Qual Life Outcomes. 2010 Aug 4;8:81. doi: 10.1186/1477-7525-8-81. Health Qual Life Outcomes. 2010. PMID: 20684767 Free PMC article.
The relationship between overall quality of life and its subdimensions was influenced by culture: analysis of an international database.
Scott NW, Fayers PM, Aaronson NK, Bottomley A, de Graeff A, Groenvold M, Koller M, Petersen MA, Sprangers MA; EORTC Quality of Life Group; Quality of Life Cross-Cultural Meta-Analysis Group. Scott NW, et al. Among authors: bottomley a. J Clin Epidemiol. 2008 Aug;61(8):788-95. doi: 10.1016/j.jclinepi.2007.08.015. Epub 2008 Mar 21. J Clin Epidemiol. 2008. PMID: 18359194
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. Among authors: bottomley a. 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
Cross-cultural development of an EORTC questionnaire to assess health-related quality of life in patients with testicular cancer: the EORTC QLQ-TC26.
Holzner B, Efficace F, Basso U, Johnson CD, Aaronson NK, Arraras JI, Smith AB, Chow E, Oberguggenberger AS, Bottomley A, Steiner H, Incrocci L, Giesinger JM. Holzner B, et al. Among authors: bottomley a. Qual Life Res. 2013 Mar;22(2):369-78. doi: 10.1007/s11136-012-0147-1. Epub 2012 Mar 10. Qual Life Res. 2013. PMID: 22407356 Free PMC article.
294 results