Reliability and construct validity of the SF-36 in Turkish cancer patients
Cite this article as: Pinar, R. Qual Life Res (2005) 14: 259. doi:10.1007/s11136-004-2393-3 Abstract
In this study, we assessed the reliability and construct validity of the SF-36, Turkish version on 419 cancer patients. Cronbach’s α coefficients surpassed the 0.70 criterions for all subscales indicating good internal consistency. Results of the test–retest method showed that the stability coefficients for the eight subscales of the SF-36 ranged between 0.81 and 0.94. Principal components factor analysis with varimax rotation confirmed the presence of seven factors in the SF-36: physical functioning, role limitations due to physical and emotional problems, mental health, general health perception, bodily pain, social functioning, and vitality. In conclusion, the Turkish version of the SF-36 is a suitable instrument that could be employed in cancer research in Turkey.
Keywords cancer patients construct validity reliability SF-36 References Parker, SG, Peet, SM, Jagger, C, Farhan, M, Castleden, CM 1998 Measuring health status in older patients: The SF-36 in practice Age Ageing 27 13 18 PubMed Google Scholar Hobson, P, Bhowmick, B, Meara, J 1997 Use of the SF-36 questionnaire in cerebrovascular disease Stroke 28 464 465 Google Scholar
Atagoz K. Quality of life among patients with chronic obstructive lung disease. Unpublished master’s thesis, University of Dokuz Eylul, Izmir, Turkey, 1998.
ın, S, Yavuz, T, Duven, H 2002 Effects of coronary by-pass operations on quality of life in early stage in patients who over 65 years old Turk J Geriatr 5 64 67 Google Scholar Chen, AY, Frankowski, R, Bishop-Leone, J, Hebert, T, Leyk, S, Lewin, J, Goepfert, H 2001 The development and validation of a dysphasia-specific quality-of-life questionnaire for patients with head and neck cancer: The Anderson dysphasia inventory Arch Otolaryngol Head Neck Surg 127 870 876 PubMed Google Scholar Jenkinson, C, Coulter, A, Wright, L 1993 Short form 36 (SF-36) health survey questionnaire: Normative data for adults of working age Br Med J 306 1437 1440 Google Scholar McHorney, CA, Ware, JE, Lu, JF, Sherbourne, JD 1994 The MOS 36-item Short Form Health Survey III: Tests of data quality, scaling assumptions, and reliability across diverse patient groups Med Care 32 40 66 PubMed Google Scholar Pinar, R, Cinar, S, Issever, M, Albayrak, M, Ilhan, S 1995 Quality of life in ESRD: Influence of haemodialysis and renal transplantation Cı
ınar Hemsire Derg 1 1 5 Google Scholar
Pinar R. Self-reported quality of life and effecting factors in patients with diabetes mellitus. Unpublished doctoral dissertation, University of Istanbul, Istanbul, Turkey, 1995.
Ware, JE, Sherbourne, CD 1992 The MOS 36 item short form health survey (SF 36) Med Care 30 473 483 PubMed Google Scholar Ware, JE 1993 Measuring patients’ views: The optimum outcome measure Br Med J 306 1429 1430 Google Scholar Aaronson, NK, Muller, M, Cohen, PD, et al. 1998 Translation, validation, and norming of the Dutch language Version of the SF-36 health survey in community and chronic disease populations J Clin Epidemiol 51 1055 1068 CrossRef PubMed Google Scholar Ware, JE 1989User’s Manual/SF 36 Health Status Questionnaire. New England Medical Center, The Health Institute Boston, MA Google Scholar
Fi şek G. Personal communication, 2002.
Gandek B. Psychometric analysis of the SF-36 Health Survey: Turkish data. Unpublished manuscript, 1997.
Cronbach, LJ 1951 Coefficient alpha and the internal structure of tests Psychometrika 16 297 334 Google Scholar Shrout, PE, Fleiss, JL 1979 Intraclass correlations: Uses in assessing interrater reliability Phychol Bull 36 420 428 Google Scholar Streiner, DL, Norman, GR 1989Health Measurement Scales: A Practical Guide to Their Development and Use Oxford University Press Oxford Google Scholar Ozdamar, K 1999Statistical Data Analysis with Standard Statistical Programs2nd ed Kaan Publishing Eskisehir, Turkey Google Scholar Jolliffe, IT 1986Principal Component Analysis Springer New York Google Scholar Ware, JE, Gandek, B 1994 IQOLA Project Group. The SF-36 Health Survey: Development and use in mental health research and the IQOLA project Int J Ment Health 23 49 73 Google Scholar Sullivan, M, Karlsson, J, Ware, JE 1995 The Swedish SF-36 Health Survey-I. Evaluation of data quality, scaling assumptions, reliability and construct validity across general populations in Sweden Soc Sci Med 41 1349 1358 CrossRef PubMed Google Scholar Nunnaly, JC, Bernstein, IH 1994Psychometric Theory McGraw-Hill New York Google Scholar Brink, PJ, Wood, MJ 1989Advanced Design in Nursing Research Sage Publications London Google Scholar Garratt, AM, Ruta, DA, Abdalla, MI, Buckingham, JK, Russell, IT 1993 The SF-36 health survey questionnaire: An outcome measure suitable for routine use within the NHS? Br Med J 306 1440 1444 Google Scholar