Validity and Reliability of Short Form-12 Questionnaire in Iranian Hemodialysis Patients

Authors

  • Amir H Pakpour Department of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran Author
  • Saeedeh Nourozi Department of Health Education, School of Health, Yazd University of Medical Sciences, Yazd, Iran Author
  • Stig Molsted Faculty of Life Sciences, Institut for Basal Husdyr- og Veterinærvidenskab, Copenhagen University, Copenhagen and Hillerød Hospital, Hillerød, Denmark Author
  • Adrian P Harrison Faculty of Life Sciences, Institut for Basal Husdyr- og Veterinærvidenskab, Copenhagen University, Copenhagen, Denmark Author
  • Khadije Nourozi Dialysis Unit, Emdadi Hospital, Zanjan, Iran Author
  • Bengt Fridlund School of Health Sciences, Jönköping University, Jönköping, Sweden Author

Abstract

Introduction. The aim of the study was to assess the validity and reliability of the SF-12 questionnaire in a sample of Iranian patients undergoing hemodialysis.

Materials and Methods. One hundred and forty-four hemodialysis patients were included from dialysis centers in Zanjan, Iran, and were asked to complete the SF-12 and SF-36 questionnaires. An initial test-retest reliability evaluation was performed on a sample of 70 patients from the total group, with a retest interval of 14 days. Reliability was estimated by internal consistency and validity was assessed using known-group comparisons and construct validity on the patient group as a whole. A linear regression analysis was used to assess any variation in the physical component summary and mental component summary scores of the SF-36 with the respective component summary scores of the SF-12. In addition, the factor structure of the questionnaire was extracted by performing a confirmatory factor analysis.

Results. Cronbach alpha for physical and mental component summaries were 0.89 and 0.90, respectively. The SF-12 showed a good discriminatory ability between subgroups of patients based on demographic and clinical variables. The confirmatory factor analysis for the original two-factor structure showed a good fit index (chi2 = 23.30, degrees of freedom = 13), goodness-of-fit index = 0.96, and root mean squared error of approximation = 0.079).

Conclusions. In general, the SF-12 has good psychometric properties and can be used as a shorter version of the SF-36 questionnaire in future studies involving Iranian patients undergoing hemodialysis.

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Author Biography

  • Amir H Pakpour, Department of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran

    PhD

    Department of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran,

     

    Education

    PhD ,Health education.Tarbiat Modares University.      

    MSc, Health education, Iran university medical of sciences.

    Bachelor of Science, Public health. Shahid behesti university medical of sciences.

     

     

    PhD Thesis title: Explanatory Randomized Controlled Trial of the effectiveness of an educational intervention in increasing the frequency of oral self-care behaviours

     

    Teaching background

    Public Health

    Health communication

    Published Manuscript publication:

    1- Pakpour AH, Saffari M, Yekaninejad MS, Panahi D, Harrison AP, Molsted S. Health-Related Quality of Life in a sample of Iranian ESRD Patients treated with hemodialysis.Iranian journal of kidney disease. Iran J Kidney Dis. 2010 Jan;4(1):50-9.

    2- Pakpour AH, Yekaninejad MS, Mohammadi NK, Molsted S, Zarei F, Patti F, Harrison A. Health-related quality of life in Iranian patients with multiple sclerosis: a cross-cultural study. Neurol Neurochir Pol. 2009 November-December;43(6):517-526.

    Manuscript accepted for publication:

    1- PAkpour AH, Yekaninejad MS, Harrison A .Translation and psychometric evaluation of the Iranian version of EORTC QLQ-OES18. Psycho-Oncology.

    2-PAkpour AH, Yekaninejad MS,Mohammadi NK,Montazeri A. Oral health attitudes, intentions and behaviors in Iranian adolescents: exploring the effectiveness of Message framing

    3- Pakpour, A.H.message framing and oral health; A Cross-Cultural Analysis.

    4-translation and validation Iranian version of KDQOL in ESRD patients.

    5. The status of dental caries and related factors in a sample of Iranian adolescents. Med Oral Patol Oral Cir Bucal.

    Instrument

    Translation and cultural adoption KDQOL-SF™ v1.3. http://gim.med.ucla.edu/kdqol/downloads/download.html.

    Research interest

    I am interested in studying factors that diminish a person’s quality of life. Identifying such factors will facilitate long-term goals of developing treatment interventions that improve both symptoms and quality of life.  

    Moreover, my research interests focus on cultural differences in conceptions of self and social cognition with implications for health-related information processing, interpersonal relationships, and question comprehension and answering in survey contexts.

    And Finally, I am interested in developing and testing 1) theory of behaviour change and 2) interventions to change behaviours relevant to health and health care.

     

    Contact

    Department of Public Health, Qazvin University of Medical Sciences, Qazvin, Iran,

    e-mail: Pakpour_Amir@yahoo.com.

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Published

2011-04-26

Issue

Section

ORIGINAL | Dialysis

How to Cite

Validity and Reliability of Short Form-12 Questionnaire in Iranian Hemodialysis Patients. (2011). Iranian Journal of Kidney Diseases, 5(3), 175-181. https://www.ijkd.org/index.php/ijkd/article/view/393

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