Differential item functioning (DIF) in the EORTC QLQ-C30: a comparison of baseline, on-treatment and off-treatment data

Neil W Scott; Peter M Fayers; Neil K Aaronson; Andrew Bottomley; Alexander de Graeff; Mogens Groenvold; Chad Gundy; Michael Koller; Morten A Petersen; Mirjam A G Sprangers; EORTC Quality of Life Group and the Quality of Life Cross-Cultural Meta-Analysis Group

doi:10.1007/s11136-009-9453-7

Differential item functioning (DIF) in the EORTC QLQ-C30: a comparison of baseline, on-treatment and off-treatment data

Neil W Scott, Peter M Fayers, Neil K Aaronson, Andrew Bottomley, Alexander de Graeff, Mogens Groenvold, Chad Gundy, Michael Koller, Morten A Petersen, Mirjam A G Sprangers, EORTC Quality of Life Group and the Quality of Life Cross-Cultural Meta-Analysis Group

24 Citations (Scopus)

Abstract

Differential item functioning (DIF) analyses can be used to explore translation, cultural, gender or other differences in the performance of quality of life (QoL) instruments. These analyses are commonly performed using "baseline" or pretreatment data. We previously reported DIF analyses to examine the pattern of item responses for translations of the European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30 QoL instrument, using only data collected prior to cancer treatment. We now compare the consistency of these results with similar analyses of on-treatment and off-treatment assessments and explore whether item relationships differ from those at baseline.

Original language	English
Journal	Quality of Life Research
Volume	18
Issue number	3
Pages (from-to)	381-8
Number of pages	8
ISSN	0962-9343
DOIs	https://doi.org/10.1007/s11136-009-9453-7
Publication status	Published - 2009

Keywords

Analysis of Variance
Health Status
Humans
Neoplasms
Quality of Life
Questionnaires
Statistics as Topic

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Scott, N. W., Fayers, P. M., Aaronson, N. K., Bottomley, A., de Graeff, A., Groenvold, M., Gundy, C., Koller, M., Petersen, M. A., Sprangers, M. A. G., & EORTC Quality of Life Group and the Quality of Life Cross-Cultural Meta-Analysis Group (2009). Differential item functioning (DIF) in the EORTC QLQ-C30: a comparison of baseline, on-treatment and off-treatment data. Quality of Life Research, 18(3), 381-8. https://doi.org/10.1007/s11136-009-9453-7

Scott, NW, Fayers, PM, Aaronson, NK, Bottomley, A, de Graeff, A, Groenvold, M, Gundy, C, Koller, M, Petersen, MA, Sprangers, MAG & EORTC Quality of Life Group and the Quality of Life Cross-Cultural Meta-Analysis Group 2009, 'Differential item functioning (DIF) in the EORTC QLQ-C30: a comparison of baseline, on-treatment and off-treatment data', Quality of Life Research, vol. 18, no. 3, pp. 381-8. https://doi.org/10.1007/s11136-009-9453-7

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Differential item functioning (DIF) in the EORTC QLQ-C30: a comparison of baseline, on-treatment and off-treatment data

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