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Psychometric evaluation of the German version of the Recovering Quality of Life (ReQoL) measures in patients with affective disorders

Author

Listed:
  • Thomas Grochtdreis

    (University Medical Center Hamburg-Eppendorf)

  • Hans-Helmut König

    (University Medical Center Hamburg-Eppendorf)

  • Anju Devianee Keetharuth

    (The University of Sheffield)

  • Jürgen Gallinat

    (University Medical Center Hamburg-Eppendorf)

  • Alexander Konnopka

    (University Medical Center Hamburg-Eppendorf)

  • Holger Schulz

    (University Medical Center Hamburg-Eppendorf)

  • Martin Lambert

    (University Medical Center Hamburg-Eppendorf)

  • Anne Karow

    (University Medical Center Hamburg-Eppendorf)

  • Judith Dams

    (University Medical Center Hamburg-Eppendorf)

Abstract

Background The generic self-reported Recovering Quality of Life (ReQoL) measures were developed for measuring recovery-focused health-related quality of life (HrQoL) in persons with mental health conditions. The aim of this study was to assess the psychometric properties of the German version of the ReQoL measures in patients with affective disorders in Germany. Methods Data from a patient sub-sample in a randomized controlled trial have been used (N = 393). The internal consistency and the test–retest reliability of the ReQoL measures were assessed using Cronbach’s Alpha and the intra-class correlation coefficient (ICC). The concurrent validity and the known-group validity of the ReQoL measures were assessed using Pearson’s Correlation coefficient and Cohen’s d. The responsiveness was assessed using Glass' Δ and the standardized response mean (SRM). Results The reliability among the items of the ReQoL-20 was overall excellent. The ICC of the ReQoL-20 was r = 0.70, indicating moderate test–retest reliability. The concurrent validity of the ReQoL-20 with the clinical measure PHQ-9 was strong with a correlation coefficient of r = − 0.76. The known-group validity of the ReQoL-20 using PHQ-9 cut-off points was large with an effect size of d = 1.63. The ReQoL measures were sensitive to treatment response and remission of symptoms measured by the PHQ-9 with large effect sizes/SRM. Discussion The psychometric properties of the ReQoL measures for the assessment of patients with affective disorders were overall good. With the ReQoL, valid and reliable measures for the assessment of recovery-focused HrQoL for persons with affective disorders are available in German language.

Suggested Citation

  • Thomas Grochtdreis & Hans-Helmut König & Anju Devianee Keetharuth & Jürgen Gallinat & Alexander Konnopka & Holger Schulz & Martin Lambert & Anne Karow & Judith Dams, 2023. "Psychometric evaluation of the German version of the Recovering Quality of Life (ReQoL) measures in patients with affective disorders," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 24(4), pages 499-512, June.
    • Handle: RePEc:spr:eujhec:v:24:y:2023:i:4:d:10.1007_s10198-022-01489-z
    DOI: 10.1007/s10198-022-01489-z
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    References listed on IDEAS

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    1. Lee Cronbach, 1951. "Coefficient alpha and the internal structure of tests," Psychometrika, Springer;The Psychometric Society, vol. 16(3), pages 297-334, September.
    2. Ebrahim, Shah, 1995. "Clinical and public health perspectives and applications of health-related quality of life measurement," Social Science & Medicine, Elsevier, vol. 41(10), pages 1383-1394, November.
    3. Connell, Janice & O'Cathain, Alicia & Brazier, John, 2014. "Measuring quality of life in mental health: Are we asking the right questions?," Social Science & Medicine, Elsevier, vol. 120(C), pages 12-20.
    4. Kristina Ludwig & J.-Matthias Graf von der Schulenburg & Wolfgang Greiner, 2018. "German Value Set for the EQ-5D-5L," PharmacoEconomics, Springer, vol. 36(6), pages 663-674, June.
    5. Anju Devianee Keetharuth & Elizabeth Taylor Buck & Catherine Acquadro & Katrin Conway & Janice Connell & Michael Barkham & Jill Carlton & Thomas Ricketts & Rosemary Barber & John Brazier, 2018. "Integrating Qualitative and Quantitative Data in the Development of Outcome Measures: The Case of the Recovering Quality of Life (ReQoL) Measures in Mental Health Populations," IJERPH, MDPI, vol. 15(7), pages 1-14, June.
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    More about this item

    Keywords

    Reliability; Validity; Responsiveness; EQ-5D; SF6D; Health-related quality of life; Mood disorders; Germany;
    All these keywords.

    JEL classification:

    • I10 - Health, Education, and Welfare - - Health - - - General
    • I30 - Health, Education, and Welfare - - Welfare, Well-Being, and Poverty - - - General

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