title: Measuring health related quality of life (hrqol) in renal transplant patients: psychometric properties and cross-cultural adaptation of kidney transplant questionnaire (ktq-25) in persian.
abstract: BACKGROUND
  Different measuring tools have been used to understand the outcomes of renal replacement therapies. The goal of renal transplantation is both to ensure survival, and to promote quality of life in the patients. One of the widely used disease-specific instruments to measure the quality of life is the Kidney Transplant Questionnaire (KTQ-25).
  
  
  OBJECTIVE
  The current study aimed to perform a cross-cultural adaptation and assess the psychometric properties of the KTQ-25 to Persian.
  
  
  METHODS
  The KTQ-25 was trasnlated according to International Quality of Life Assessment (IQOLA) translation methodology. Cronbach's alpha coefficient, and test-re-test were used to determine internal consistency, and reliability respectively.
  
  
  RESULTS
  In the test-re-test reliability of all questionnaire items, Pearson correlation was r = 0.96 (P < 0.001). Cronbach's alpha coefficient estimated the internal consistency for each scale andalpha equal or more than 0.73 was considered satisfactory. Criterion-related validity, measured by the correlation coefficients between the KTQ-25 and the SF-36 Health Survey, was r = 0.63 (P < 0.001).
  
  
  CONCLUSIONS
  The psychometric properties of the Kidney Transplant Questionnaire (KTQ-25) in Persian have proven to be satisfactory, therefore the application of this questionnaire in clinical practice can be recommended.
authors.affiliation: Faculty of Nursing, Baqiyatallah University of Medical Sciences, Tehran, IR Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Tayyebi
authors.forename: Afsaneh
authors.initials: A
authors.lastname: Raiesifar
authors.forename: Soheil
authors.initials: S
authors.lastname: Najafi Mehri
authors.forename: Abbas
authors.initials: A
authors.lastname: Ebadi
authors.forename: Behzad
authors.initials: B
authors.lastname: Einolahi
authors.forename: Shadi
authors.initials: S
authors.lastname: Pashandi
keywords: Kidney Transplantation; Psychometrics; Quality of Life; Questionnaires