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Quality of life in patients with fibromyalgia: validation and psychometric properties of the German Quality of Life Scale (QOLS-G)

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Abstract

Our objectives were to translate the Quality of Life Scale (QOLS) into German and to evaluate its reliability and validity for the use in patients with fibromyalgia (FMS). Together with German versions of the Fibromyalgia Impact Questionnaire (FIQ), the SF-36, a tender point count (TPC) and other questionnaires, we administered the QOLS to 146 patients with FMS. Patients were asked about the severity of pain today (VAS) and the duration of symptoms. Test–retest reliability was assessed using Spearman’s correlations. Internal consistency was evaluated with Cronbach’s alpha. Construct validity of the QOLS was evaluated by correlating the QOLS with the FIQ, the SF-36, the Beck Depression Inventory (BDI), and the Symptom Checklist (SCL-90-R) as well as with the pain variables. An exploratory factor analysis (EFA) was also conducted. Mean age was 53.1 years. Means were for pain today 6.8 and for duration of symptoms 11.8 years. Test–retest reliability for the total QOLS was rho = .91. Internal consistency was α = .90. Low-to-moderate correlations were obtained between the QOLS and the total FIQ (rho = −.42**), the SF-36 (e.g. physical functioning rho = .37**; mental health rho = .56**) as well as the pain variables (VAS rho = −.11 ns; TPC rho = −.20*). Psychological variables were moderately to substantially correlated with the QOLS (e.g. BDI rho = −.61**). An EFA suggested a three-factor solution. The QOLS-G is a reliable and valid instrument for measuring quality of life in German patients with FMS.

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References

  1. Wolfe F, Smythe HA, Yunus MB, Bennett RM, Bombardier C, Goldenberg DL, Tugwell P, Campbell SM, Abeles M, Clark P et al (1990) The American College of Rheumatology 1990 criteria for the classification of fibromyalgia. Report of the Multicenter Criteria Committee. Arthr Rheum 33(2):160–172

    Article  CAS  Google Scholar 

  2. Sprangers MA, Schwartz CE (1999) Integrating response shift into health-related quality of life research: a theoretical model. Soc Sci Med 48(11):1507–1515

    Article  PubMed  CAS  Google Scholar 

  3. Hawley DJ, Wolfe F, Cathey MA (1988) Pain, functional disability, and psychological status: a 12-month study of severity in fibromyalgia. J Rheumatol 15(10):1551–1556

    PubMed  CAS  Google Scholar 

  4. Henriksson C, Gundmark I, Bengtsson A, Ek AC (1992) Living with fibromyalgia. Consequences for everyday life. Clin J Pain 8(2):138–144

    Article  PubMed  CAS  Google Scholar 

  5. Bernard AL, Prince A, Edsall P (2000) Quality of life issues for fibromyalgia patients. Arthr Care Res 13(1):42–50

    Article  CAS  Google Scholar 

  6. Neumann L, Berzak A, Buskila D (2000) Measuring health status in Israeli patients with fibromyalgia syndrome and widespread pain and healthy individuals: utility of the short form 36-item health survey (SF-36). Semin Arthr Rheum 29(6):400–408

    Article  CAS  Google Scholar 

  7. Salaffi F, Sarzi-Puttini P, Girolimetti R, Atzeni F, Gasparini S, Grassi W (2009) Health-related quality of life in fibromyalgia patients: a comparison with rheumatoid arthritis patients and the general population using the SF-36 health survey. Clin Exp Rheumatol 27(5 Suppl 56):S67–S74

    PubMed  CAS  Google Scholar 

  8. Burckhardt CS, Clark SR, Bennett RM (1993) Fibromyalgia and quality of life: a comparative analysis. J Rheumatol 20(3):475–479

    PubMed  CAS  Google Scholar 

  9. Kosinski M, Zhao SZ, Dedhiya S, Osterhaus JT, Ware JE Jr (2000) Determining minimally important changes in generic and disease-specific health-related quality of life questionnaires in clinical trials of rheumatoid arthritis. Arthr Rheum 43(7):1478–1487

    Article  CAS  Google Scholar 

  10. Strand V, Singh JA (2007) Improved health-related quality of life with effective disease-modifying antirheumatic drugs: evidence from randomized controlled trials. Am J Manag Care 13(Suppl 9):S237–S251

    PubMed  Google Scholar 

  11. Testa MA, Simonson DC (1996) Assessment of quality-of-life outcomes. N Engl J Med 334(13):835–840

    Article  PubMed  CAS  Google Scholar 

  12. Smith KW, Avis NE, Assmann SF (1999) Distinguishing between quality of life and health status in quality of life research: a meta-analysis. Qual Life Res 8(5):447–459

    Article  PubMed  CAS  Google Scholar 

  13. Mason JH, Anderson JJ, Meenan RF (1988) A model of health status for rheumatoid arthritis. A factor analysis of the arthritis impact measurement scales. Arthr Rheum 31(6):714–720

    Article  CAS  Google Scholar 

  14. Flanagan JC (1978) A research approach to improving our quality of life. Am Psychol 33:138–147

    Article  Google Scholar 

  15. Burckhardt CS, Woods SL, Schultz AA, Ziebarth DM (1989) Quality of life of adults with chronic illness: a psychometric study. Res Nurs Health 12(6):347–354

    Article  PubMed  CAS  Google Scholar 

  16. Burckhardt CS, Archenholtz B, Bjelle A (1992) Measuring the quality of life of women with rheumatoid arthritis or systemic lupus erythematosus: a Swedish version of the quality of life scale (QOLS). Scand J Rheumatol 21(4):190–195

    Article  PubMed  CAS  Google Scholar 

  17. Burckhardt C, Archenholtz B, Mannerkorpi K, Bjelle A (1993) Quality of life of Swedish women with fibromyalgia syndrome, rheumatoid arthritis or systemic lupus erythematosus. J Musculoskelet Pain 1:199–207

    Article  Google Scholar 

  18. Hägg O, Burckhardt C, Fritzell P, Nordwall A (2003) Quality of life in chronic low back pain patients: a comparison with fibromyalgia and the general population. J Musculoskelet Pain 11:31–38

    Article  Google Scholar 

  19. Rohde G, Haugeberg G, Mengshoel AM, Moum T, Wahl AK (2008) Is global quality of life reduced before fracture in patients with low-energy wrist or hip fracture? A comparison with matched controls. Health Qual Life Outcomes 6:90

    Article  PubMed  Google Scholar 

  20. Burckhardt CS, Jones KD (2005) Effects of chronic widespread pain on the health status and quality of life of women after breast cancer surgery. Health Qual Life Outcomes 3:30

    Article  PubMed  Google Scholar 

  21. Neumann L, Buskila D (1997) Measuring the quality of life of women with fibromyalgia: a Hebrew version of the quality of life scale (QOLS). J Musculoskelet Pain 5:5–17

    Article  Google Scholar 

  22. Wahl A, Burckhardt C, Wiklund I, Hanestad BR (1998) The Norwegian version of the quality of life scale (QOLS-N). A validation and reliability study in patients suffering from psoriasis. Scand J Caring Sci 12(4):215–222

    Article  PubMed  CAS  Google Scholar 

  23. Guillemin F, Bombardier C, Beaton D (1993) Cross-cultural adaptation of health-related quality of life measures: literature review and proposed guidelines. J Clin Epidemiol 46(12):1417–1432

    Article  PubMed  CAS  Google Scholar 

  24. Lautenschläger J, Brückle W, Seglias J, Müller W (1988) Die Messung von Druckschmerzen im Bereich von Sehnen und Muskeln bei Gesunden und Patienten mit generalisierter Tendomyopathie (Fibromyalgie-Syndrom). Z Rheumatol 47:397–404

    PubMed  Google Scholar 

  25. Burckhardt CS, Clark SR, Bennett RM (1991) The fibromyalgia impact questionnaire: development and validation. J Rheumatol 18(5):728–733

    PubMed  CAS  Google Scholar 

  26. Offenbaecher M, Waltz M, Schoeps P (2000) Validation of a German version of the fibromyalgia impact questionnaire (FIQ-G). J Rheumatol 27(8):1984–1988

    PubMed  CAS  Google Scholar 

  27. Bullinger M (1995) German translation and psychometric testing of the SF-36 health survey: preliminary results from the IQOLA. Project international quality of life assessment. Soc Sci Med 41(10):1359–1366

    Article  PubMed  CAS  Google Scholar 

  28. Burckhardt CS, O’Reilly CA, Wiens AN, Clark SR, Campbell SM, Bennett RM (1994) Assessing depression in fibromyalgia patients. Arthr Care Res 7(1):35–39

    Article  CAS  Google Scholar 

  29. Baumstark KE, Buckelew SP, Sher KJ, Beck N, Buescher KL, Hewett J, Crews TM (1993) Pain behavior predictors among fibromyalgia patients. Pain 55(3):339–346

    Article  PubMed  CAS  Google Scholar 

  30. Bland JM, Altman DG (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1(8476):307–310

    Article  PubMed  CAS  Google Scholar 

  31. Cronbach LJ (1951) Coefficient alpha and the internal structure of tests. Psychometrika 16:297–334

    Article  Google Scholar 

  32. Burckhardt CS, Anderson KL, Archenholtz B, Hagg O (2003) The Flanagan quality of life scale: evidence of construct validity. Health Qual Life Outcomes 1:59

    Article  PubMed  Google Scholar 

  33. Burckhardt CS, Anderson KL (2003) The quality of life scale (QOLS): reliability, validity, and utilization. Health Qual Life Outcomes 1:60

    Article  PubMed  Google Scholar 

  34. Nunnally JC (1978) Psychometric theory. McGraw-Hill, New York

    Google Scholar 

  35. Burckhardt CS, Archenholtz B, Bjelle A (1993) Quality of life of women with systemic lupus erythematosus: a comparison with women with rheumatoid arthritis. J Rheumatol 20(6):977–981

    PubMed  CAS  Google Scholar 

  36. Sprangers MA, Schwartz CE (1999) The challenge of response shift for quality-of-life-based clinical oncology research. Ann Oncol 10(7):747–749

    Article  PubMed  CAS  Google Scholar 

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Acknowledgments

We would like to thank Robin Hieblinger for her meticulous proof reading of the final manuscript. Niko Kohls work is made possible through the generous long-standing support of the Samueli Institute, USA.

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The authors declare that they have no conflict of interest.

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Correspondence to Martin Offenbächer.

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Offenbächer, M., Sauer, S., Kohls, N. et al. Quality of life in patients with fibromyalgia: validation and psychometric properties of the German Quality of Life Scale (QOLS-G). Rheumatol Int 32, 3243–3252 (2012). https://doi.org/10.1007/s00296-011-2184-4

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