Validation of the EORTC QLQ-C30 quality of life questionnaire through combined qualitative and quantitative assessment of patient-observer agreement

Journal of Clinical Epidemiology

Volumn 50, Issue 4, 1997, Pages 441-450

  Groenvold, Mogens ^a,b   Klee, Marianne Carol ^a   Sprangers, Mirjam A G ^d   Aaronson, Neil K ^c  

^a Rigshospitalet   (Denmark)

^b UNIVERSITY OF COPENHAGEN   (Denmark)

^c NETHERLANDS CANCER INSTITUTE   (Netherlands)

^d NONE

Author keywords

Cancer; Health status assessment; Patient observer agreement; Quality of life; Questionnaire; Validity

Indexed keywords

ADULT; AGED; ARTICLE; CANCER PATIENT; CLINICAL TRIAL; CONTROLLED CLINICAL TRIAL; CONTROLLED STUDY; FEMALE; HEALTH STATUS; HUMAN; MAJOR CLINICAL STUDY; OBSERVER VARIATION; PRIORITY JOURNAL; QUALITY OF LIFE; QUESTIONNAIRE; RATING SCALE; SELF EVALUATION; SYMPTOM;

ADULT; AGED; BREAST NEOPLASMS; CHI-SQUARE DISTRIBUTION; FEMALE; GENITAL NEOPLASMS, FEMALE; HEALTH STATUS INDICATORS; HUMANS; MALE; MIDDLE AGED; OBSERVER VARIATION; QUALITY OF LIFE; QUESTIONNAIRES; REPRODUCIBILITY OF RESULTS;

EID: 0030918409     PISSN: 08954356     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0895-4356(96)00428-3     Document Type: Article

References (28)

1. Slevin ML, Plant H, Lynch D, Drinkwater J, Gregory WM. Who should measure quality of life, the doctor or the patient? Br J Cancer 1988; 57: 109-112.
2. Bowling A. Measuring Health: A Review of Quality of Life Measurement Scales. Milton Keynes: Open University Press; 1991.
3. McDowell I, Newell C. Measuring Health. A Guide to Rating Scales and Questionnaires. New York: Oxford University Press; 1987.
4. Jaeschke R, Guyatt G. How to develop and validate a new quality of life instrument. In: Spilker B, Ed. Quality of Life Assessment in Clinical Trials. New York: Raven Press; 1990: pp. 47-57.
5. Belson WA. The Design and Understanding of Survey Questions. Hants: Gower; 1981.
6. Sprangers MAG, Aaronson NK. The role of health care providers and significant others in evaluating the quality of life of patients with chronic disease: A review. J Clin Epidemiol 1992; 45: 743-760.
7. Aaronson NK, Bullinger M, Ahmedzai S. A modular approach to quality-of-life assessment in cancer clinical trials. Recent Results Cancer Res 1988; 111: 231-249.
8. Aaronson NK, Ahmedzai S, Bullinger M, Grabeels D, Estape J, Filiherti A, Flechtner H, Frick U, Hürny C, Kaasa S, Klee MC, Mastilica M, Osoha D, Pfausler B, Razavi D, Rofe PB, Schraub S, Sullivan M, Takeda F. The EORTC Core Quality-of-Life Questionnaire: Interim results of an international field study. In: Osoha D, Ed. Effect of Cancer on Quality of Life. Boca Raton: CRC Press Inc.; 1991: pp. 185-203.
9. Aaronson NK, Ahmedzai S, Bergman B, Bullinger M, Cull A, Duez NJ, Filiberti A, Flechtner H, Fleishmann SB, de Haes JCJM, Kaasa S, Klee M, Osoba D, Razavi D, Rofe PB, Schraub S, Sneeuw K, Sullivan M, Takeda F. The European Organization for Research and Treatment of Cancer QLQ-C30: A quality-of-life instrument for use in international clinical trials in oncology. J Natl Cancer Inst 1993; 85: 365-376.
10. Bjordal K, Kaasa S. Psychometric validation of the EORTC core quality of life questionnaire, 30-item version and a diagnosis-specific module for head and neck cancer patients. Acta Oncol 1992; 31: 311-321.
11. Niezgoda HE, Pater JL. A validation study of the domains of the core EORTC Quality of Life Questionnaire. Qual Life Res 1993; 2: 319-325.
12. Sigurdardottir V, Bolund C, Brandberg Y, Sullivan M. The impact of generalized malignant melanoma on quality of life evaluated by the EORTC questionnaire technique. Qual Life Res 1993; 2: 193-203.
13. Ringdal GI, Ringdal K. Testing the EORTC Quality of Life Questionnaire on cancer patients with heterogeneous diagnoses. Qual Life Res 1993; 2: 129-140.
14. Hjermstad MJ, Fossa SD, Bjordal K, Kaasa S. Test/retest study of the European Organization for Research and Treatment of Cancer Core Quality-of-Life Questionnaire. J Clin Oncol 1995; 13: 1249-1254.
15. Groenvold M, Bjorner JB, Klee MC, Kreiner S. Test for item bias in a quality of life questionnaire. J Clin Epidemiol 1995; 48: 805-816.
16. Danish Breast Cancer Cooperative Group. [DBCG-89. Program for Treatment and Follow-Up of Patients With Primary, Operable Breast Cancer] [in Danish]. Copenhagen: DBCG-Sekretariatet; 1989.
17. Siegel S, Castellan NJ, Jr. Nonparametric Statistics for the Behavioral Sciences. Singapore: McGraw-Hill; 1988.
18. Cohen J. A coefficient of agreement for nominal scales. Educ Psychol Meas 1960; 20: 37-46.
19. Cohen J. Weighted kappa: Nominal scale disagreement with provision for scaled disagreement or partial credit. Psychol Bull 1968; 70: 213-220.
20. Streiner DL, Norman GR. Health Measurement Scales - A Practical Guide to Their Development and Use. Oxford: Oxford University Press; 1995.
21. Fleiss JL, Cohen J. The equivalence of weighted kappa and the intraclass correlation coefficient as measures of reliability. Educ Psychol Meas 1973; 33: 613-619.
22. Fleiss JL, Cohen J, Everitt BS. Large sample standard errors of kappa and weighted kappa. Psychol Bull 1969; 72: 323-327.
23. SAS Institute Inc. SAS Language: Reference, Version 6, First Edition. Cary, NC: SAS Institute Inc.; 1990.
24. Landis JR, Koch GG. The measurement of observer agreement for categorial data. Biometrics 1977; 33: 159-174.
25. Guyatt GH, Townsend M, Berman LB, Keller JL. A comparison of Likert and visual analogue scales for measuring change in function. J Chron Dis 1987; 40: 1129-1133.
26. Feinstein AR, Cicchetti DV. High agreement but low kappa: I. The problems of two paradoxes. J Clin Epidemiol 1990; 43: 543-549.
27. Cicchetti DV, Feinstein AR. High agreement but low kappa: II. Resolving the paradoxes. J Clin Epidemiol 1990; 43: 551-558.
28. Orne MT. Demand characteristics and the concept of quasi-controls. In: Rosenthal R, Rosnow RL, Eds. Artifact in Behavioral Research. New York: Academic Press; 1969.