Reliability and validity of the Iranian version of the Pediatric Quality of Life Inventory™ 4.0 Generic Core Scales in adolescents
- 239 Downloads
The objective of this study was to investigate the reliability and validity of the Iranian version of the Pediatric Quality of Life Inventory™ 4.0 (PedsQL™ 4.0) Generic Core Scales in adolescents
After linguistic validation, the Iranian version of the PedsQL™ 4.0 was completed by 848 healthy and 26 chronically ill adolescents aged 13–18 years and their parents.
The internal consistency as measured by Cronbach’s alpha coefficients exceeded the minimum reliability standard of .70. No floor effects were observed. Ceiling effects detected ranged from 1.5% for adolescent self-report total scale score to 42.2% for self-report social functioning. All monotrait-multimethod correlations were higher than multitrait-multimethod correlations. The intraclass correlation coefficients (ICC) between adolescent self-report and parent proxy-report showed good to excellent agreement. Exploratory factor analysis supported mainly comparable results with the original US English dialect version. The results of the confirmatory factor analysis for 5-factor models for both self-report and proxy-report indicated acceptable fit for the proposed models. Regarding gender and health status, as hypothesized from previous studies, girls reported lower health-related quality of life than boys on the total score, physical and emotional functioning, and healthy adolescents reported significantly higher health-related quality of life than those with chronic illnesses.
The findings support the initial reliability and validity of the Iranian version of the PedsQL™ 4.0 as a generic instrument to measure HRQOL of adolescents in Iran.
KeywordsHealth-related quality of life PedsQL™ Iran Adolescents
Health-related quality of life
- PedsQL™ 4.0
Pediatric Quality of Life Inventory™ 4.0
Exploratory factor analysis
Confirmatory factor analysis
We acknowledge the contribution of all field workers who conducted the data collection. Competing Interests: Dr. Varni holds the copyright and the trademark for the PedsQL™ and receives financial compensation from the Mapi Research Trust, which is a nonprofit research institute that charges distribution fees to for-profit companies that use the Pediatric Quality of Life Inventory™.
- 1.World Health Organization. (1948). Constitution of the World Health Organization: Basic document. Geneva, Switzerland: World Health Organization.Google Scholar
- 6.Iannaccone, S. T., Hynan, L. S., Morton, A., Buchanan, R., Limbers, C. A., & Varni, J. W. (2009). The PedsQL™ in pediatric patients with spinal muscular atrophy: Feasibility, reliability, and validity of the Pediatric Quality of Life Inventory™ generic core scales and neuromuscular module. Neuromuscular Disorders, 19(12), 805–812.CrossRefPubMedGoogle Scholar
- 8.Goldstein, S. L., Graham, N., Warady, B. A., Seikaly, M., McDonald, R., Burwinkle, T. M., et al. (2008). Measuring health-related quality of life in children with ESRD: Performance of the generic and ESRD-specific instrument of the Pediatric Quality of Life Inventory™ (PedsQL™). American Journal of Kidney Diseases, 51(2), 285–297.CrossRefPubMedGoogle Scholar
- 9.Varni, J. W., Limbers, C. A., & Burwinkle, T. M. (2007). Impaired health-related quality of life in children and adolescents with chronic conditions: A comparative analysis of 10 disease clusters and 33 disease categories/severities utilizing the PedsQL™ 4.0 Generic Core Scales. Health Quality Life Outcomes, 5, 43.CrossRefGoogle Scholar
- 12.Varni, J. W., Burwinkle, T. M., Berrin, S. J., Sherman, S. A., Artavia, K., Malcarne, V. L., et al. (2006). The PedsQL™ in pediatric cerebral palsy: Reliability, validity, and sensitivity of the Generic Core Scales and Cerebral Palsy Module. Developmental Medicine and Child Neurology, 48(6), 442–449.CrossRefPubMedGoogle Scholar
- 14.Varni, J. W., Seid, M., Smith Knight, T., Burwinkle, T., Brown, J., & Szer, I. S. (2002). The PedsQLTM in pediatric rheumatology: Reliability, validity, and responsiveness of the Pediatric Quality of Life InventoryTM Generic Core Scales and Rheumatology Module. Arthritis and Rheumatism, 46(3), 714–725.CrossRefPubMedGoogle Scholar
- 15.Varni, J. W., Burwinkle, T. M., Katz, E. R., Meeske, K., & Dickinson, P. (2002). The PedsQLTM in pediatric cancer: Reliability and validity of the Pediatric Quality of Life InventoryTM generic core scales, multidimensional fatigue scale, and cancer module. Cancer, 94(7), 2090–2106.CrossRefPubMedGoogle Scholar
- 20.Reinfjell, T., Diseth, T. H., Veenstra, M., & Vikan, A. (2006). Measuring health-related quality of life in young adolescents: Reliability and validity in the Norwegian version of the Pediatric Quality of Life Inventory™ 4.0 (PedsQL™) Generic Core Scales. Health and Quality of Life Outcomes, 4, 61.CrossRefPubMedGoogle Scholar
- 24.Klatchoian, D. A., Len, C. A., Terreri, M. T., Silva, M., Itamoto, C., Ciconelli, R. M., et al. (2008). Quality of life of children and adolescents from Sao Paulo: Reliability and validity of the Brazilian version of the Pediatric Quality of Life InventoryTM version 4.0 Generic Core Scales. Jornal de Pediatria, 84(4), 308–315.CrossRefPubMedGoogle Scholar
- 25.Gkoltsiou, K., Dimitrakaki, C., Tzavara, C., Papaevangelou, V., Varni, J. W., & Tountas, Y. (2008). Measuring health-related quality of life in Greek children: Psychometric properties of the greek version of the Pediatric Quality of Life InventoryTM 4.0 generic core scales. Quality Life Research, 17(2), 299–305.CrossRefGoogle Scholar
- 27.The MAPI Linguistic validation Process; provided on the website: http://www.mapi-research-inst.com/lvprocess.asp.
- 28.Varni, J. W. (1998). PedsQL™ translation methodology. Available from: http://www.pedsql.org.
- 33.Cohen, J. (1988). Statistical power analysis for the behavioral sciences. New York: Academin Press.Google Scholar
- 35.Limbers, C. A., Newman, D. A., & Varni, J. W. (2008). Factorial invariance of child self-report across healthy and chronic health condition groups: A confirmatory factor analysis utilizing the PedsQLTM 4.0 Generic Core Scales. Journal of Pediatric Psychology, 33(6), 630–639.CrossRefPubMedGoogle Scholar