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Open Access 01-12-2009 | Letter to the Editor

Understanding Ferguson's δ: time to say good-bye?

Authors: Berend Terluin, Dirk L Knol, Caroline B Terwee, Henrica CW de Vet

Published in: Health and Quality of Life Outcomes | Issue 1/2009

Abstract

A critique of Hankins, M: 'How discriminating are discriminative instruments?' Health and Quality of Life Outcomes 2008, 6:36.

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Hankins M: How discriminating are discriminative instruments? Health Qual Life Outcomes 2008, 6: 36. 10.1186/1477-7525-6-36PubMedCentralCrossRef

Hankins M: Questionnaire discrimination: (re)-introducing coefficient delta. BMC Med Res Methodol 2007, 7: 19. 10.1186/1471-2288-7-19PubMedCentralCrossRef

Wyrwich KW: Understanding the role of discriminative instruments in HRQoL research: can Ferguson's Delta help? Health Qual Life Outcomes 2008, 6: 82. 10.1186/1477-7525-6-82PubMedCentralCrossRef

Norman GR: Discrimination and reliability: equal partners? Health Qual Life Outcomes 2008, 6: 81. 10.1186/1477-7525-6-81PubMedCentralCrossRef

Guyatt GH: A taxonomy of health status instruments. J Rheumatol 1995, 22: 1188–1190.

Hankins M: Discrimination and reliability: equal partners? Understanding the role of discriminative instruments in HRQoL research: can Ferguson's Delta help? A response. Health Qual Life Outcomes 2008, 6: 83. 10.1186/1477-7525-6-83PubMedCentralCrossRef

de Vet HC, Bouter LM, Bezemer PD, Beurskens AJ: Reproducibility and responsiveness of evaluative outcome measures. Theoretical considerations illustrated by an empirical example. Int J Technol Assess Health Care 2001, 17: 479–487. [http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=101045] 10.1017/S0266462301106148CrossRef

Terluin B, van Marwijk HW, Adèr HJ, De Vet HC, Penninx BW, Hermens ML, van Boeijen CA, van Balkom AJ, van der Klink JJ, Stalman WAB: The Four-Dimensional Symptom Questionnaire (4DSQ): a validation study of a multidimensional self-report questionnaire to assess distress, depression, anxiety and somatization. BMC Psychiatry 2006, 6: 34. 10.1186/1471-244X-6-34PubMedCentralCrossRef

Terluin B, Van Rhenen W, Schaufeli WB, De Haan M: The Four-Dimensional Symptom Questionnaire (4DSQ): measuring distress and other mental health problems in a working population. Work Stress 2004, 18: 187–207. 10.1080/0267837042000297535CrossRef

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Hermens ML, van Hout HP, Terluin B, Adèr HJ, Penninx BW, van Marwijk HW, Bosmans JE, van Dyck R, De Haan M: Clinical effectiveness of usual care with or without antidepressant medication for primary care patients with minor or mild-major depression: a randomized equivalence trial. BMC Medicine 2007, 5: 36. 10.1186/1741-7015-5-36PubMedCentralCrossRef

Title: Understanding Ferguson's δ: time to say good-bye?
Authors: Berend Terluin
Dirk L Knol
Caroline B Terwee
Henrica CW de Vet
Publication date: 01-12-2009
Publisher: BioMed Central
Published in: Health and Quality of Life Outcomes / Issue 1/2009
Electronic ISSN: 1477-7525
DOI: https://doi.org/10.1186/1477-7525-7-38

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Understanding Ferguson's δ: time to say good-bye?

Abstract

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

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