Validity and reliability of short form-12 questionnaire in Iranian hemodialysis patients
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Validity and reliability of short form-12 questionnaire in Iranian hemodialysis patients. / Pakpour, Amir H.; Nourozi, Saeedeh; Mølsted, Stig; Harrison, Adrian Paul; Nourozi, Khadije; Fridlund, Bengt.
In: Iranian Journal of Kidney Diseases, Vol. 5, No. 3, 2011, p. 175-181.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Validity and reliability of short form-12 questionnaire in Iranian hemodialysis patients
AU - Pakpour, Amir H.
AU - Nourozi, Saeedeh
AU - Mølsted, Stig
AU - Harrison, Adrian Paul
AU - Nourozi, Khadije
AU - Fridlund, Bengt
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Former LIFE faculty
KW - health surveys
KW - quality of lie
KW - hemodialysis
KW - psychometrics
M3 - Journal article
VL - 5
SP - 175
EP - 181
JO - Iranian Journal of Kidney Diseases
JF - Iranian Journal of Kidney Diseases
SN - 1735-8582
IS - 3
ER -
ID: 37639338