Measuring health: related quality of life in hemodialysis patients. Psychometric properties of the Missoula VITAS Quality of Life Index (MVQOLI-15) in Greece
Different measuring tools have been used to understand the outcomes of end-stage renal dis ease (ESRD) therapies. However, survival, cost effectiveness and quality of life (QOL) are the main parameters to evaluate treatment of ESRD. The current study meant to assess the psycho metric properties (reliability and validity) of the Missoula-VITAS Quality of Life Index (MVQOLI 15) translation to Greek in patients undergoing hemodialysis (HD). A total sample of 79 HD patients voluntarily participated in this pilot study. Domain analysis of MVQOLI-15-Greek was conducted based on the collected data at ini tial assessment. The reliability properties of the instrument were tested using the following measures; internal consistency, repeatability, test-retest reliability and convergent validity. Domain analysis demonstrated that all domains of the questionnaire had good variability. MVQOLI-15-Greek internal consistency was sat isfactory with an overall Cronbach’s a at 0.74. Pearson’s r and intraclass correlation coefficient revealed strong correlations (ranging from 0.91 to 0.98) between initial assessment and re assessment. MVQOLI-15-Greek convergent validity analysis indicated that the domains were strongly related to the same construct. The find ings of the study indicate that the Greek version of MVQOLI-15 provided satisfactory psychomet ric properties supporting its use within patho logical populations and in the context of national QOL measurement.
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