title: Reliability and validity of the Thai version of the Pediatric Quality of Life Inventory 4.0.
abstract: OBJECTIVE
  The study aimed to evaluate the reliability and validity of the Thai version of the Pediatric Quality of Life Inventory™ 4.0 Core Scales (PedsQL) as a measure of health-related quality of life (HRQOL).
  
  
  METHODS
  The PedsQL items were completed by 2,086 pupils aged 8-15 years and 1,914 parents from four schools, and 100 pediatric outpatients and 100 parents from a University Hospital. Test-retest reliability was conducted in a randomly selected of 150 pupils at a 1-month interval.
  
  
  RESULTS
  Internal consistency reliability for the Total Scale score (α = 0.84 self-report, 0.88 proxy-report), Physical Health Summary score (α = 0.76 self-report, 0.79 proxy-report), and Psychosocial Health Summary score (α = 0.74 self-report, 0.85 proxy-report) exceeded the minimum reliability standard of 0.70. School children had significantly higher mean HRQOL scores compared to those with chronic health conditions for all subscales with the mean differences of 3.1-12.4 for self-report (p < 0.03) and 7.7-15.6 for proxy-report (p < 0.001). Test-retest reliability showed intraclass correlation coefficients above 0.60 in all subscales (p < 0.001).
  
  
  CONCLUSIONS
  The Thai version of PedsQL had adequate reliability and validity and could be used as an outcome measure of HRQOL in Thai children aged 8-15 years.
authors.affiliation: Department of Pediatrics, Faculty of Medicine, Thammasat University, Klong-Loung, Pathum Thani, Thailand. paskorn100@yahoo.com
authors.forename: Paskorn
authors.initials: P
authors.lastname: Sritipsukho
authors.forename: Matoorada
authors.initials: M
authors.lastname: Wisai
authors.forename: Montarat
authors.initials: M
authors.lastname: Thavorncharoensap
mesh_terms: D000293:Adolescent; D044466:Asian People / Q000523:psychology; D016022:Case-Control Studies; D002648:Child; D005260:Female; D006304:Health Status; D006801:Humans; D007407:Interviews as Topic; D007802:Language; D008297:Male; D010290:Parents / Q000523:psychology; D010372:Pediatrics / Q000379:methods*; D019727:Proxy; D011594:Psychometrics / Q000295:instrumentation* / Q000706:statistics & numerical data; D011788:Quality of Life; D015203:Reproducibility of Results; D057566:Self Report; D012680:Sensitivity and Specificity; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D013785:Thailand; D014175:Translating