title: Reliability and validity of the Japanese version of the KIDSCREEN-52 health-related quality of life questionnaire for children/adolescents and parents/proxies.
abstract: OBJECTIVE
  The present study aimed to assess the reliability and validity of the Japanese version of KIDSCREEN-52 (J-KIDSCREEN-52), a generic questionnaire used to assess health-related quality of life (HRQOL) among children/adolescents and parents/proxies.
  
  
  METHODS
  We conducted a school-based study, in which 1564 children and adolescents aged 8-18 years and their 1326 parents participated from five schools. They were asked to complete two questionnaires (the J-KIDSCREEN-52 and the Pediatric Quality of Life Inventory (PedsQL)), and the Oslo 3-Item Social Support (OSS-3) scale. Internal consistency reliability was measured using the Cronbach's alpha coefficient. Test-retest reliability was assessed by the Intraclass Correlation Coefficient (ICC) in the one-way random effects model in sub-samples taken approximately three to four weeks apart. Agreement between the ratings of the child and parent was evaluated using the ICC in the two-way mixed effects model among 681 pairs.
  
  
  RESULTS
  For the overall sample, Cronbach's alpha values of 10 dimensions were ≥0.70, except for one dimension. Test-retest ICCs were ≥0.60 for nearly all dimensions. Correlation coefficients between the J-KIDSCREEN-52 and the PedsQL dimensions indicated a reasonable convergent validity. Parent ratings corresponded well with child ratings (ICC = 0.38-0.62). Statistically significant differences in mean T scores were dependent on gender for seven dimensions, age group for all dimensions, and health status for two dimensions.
  
  
  CONCLUSIONS
  The J-KIDSCREEN-52 questionnaires child/adolescent and parent/proxy versions demonstrated acceptable levels of reliability and validity.
authors.affiliation: Department of Community Health and Epidemiology, Nara Medical University School of Medicine, 840 Shijo-cho, Nara, Kashihara, 634-8521, Japan, sdrnezu@m4.kcn.ne.jp.
authors.forename: Satoko
authors.initials: S
authors.lastname: Nezu
authors.forename: Hidemi
authors.initials: H
authors.lastname: Iwasaka
authors.forename: Keigo
authors.initials: K
authors.lastname: Saeki
authors.forename: Rika
authors.initials: R
authors.lastname: Ishizuka
authors.forename: Hideyo
authors.initials: H
authors.lastname: Goma
authors.forename: Nozomi
authors.initials: N
authors.lastname: Okamoto
authors.forename: Hiroko
authors.initials: H
authors.lastname: Makino
authors.forename: Masami
authors.initials: M
authors.lastname: Tanimura
authors.forename: Kazumi
authors.initials: K
authors.lastname: Yoshizaki
authors.forename: Kenji
authors.initials: K
authors.lastname: Obayashi
authors.forename: Norio
authors.initials: N
authors.lastname: Kurumatani
mesh_terms: D000293:Adolescent; D017677:Age Distribution; D002648:Child; D003430:Cross-Sectional Studies; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D010290:Parents; D011788:Quality of Life; D015203:Reproducibility of Results; D012574:Schools; D017678:Sex Distribution; D013334:Students; D011795:Surveys and Questionnaires / Q000592:standards*