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Table 4 Test–retest and internal consistency reliability of the CHU9D at scale level, among school children in grades 1–9, and stratified by school stages (n = 242)

From: Feasibility, reliability and validity of the health-related quality of life instrument Child Health Utility 9D (CHU9D) among school-aged children and adolescents in Sweden

  Test–retest Internal consistency
Canonical correlation Spearman correlation ICC Cronbach’s alpha
All 0.81 0.72 0.75 0.79
School stages
 Grades 1–3 0.87 0.74 0.76 0.72
 Grades 4–6 0.75 0.62 0.61 0.74
 Grades 7–9 0.87 0.75 0.79 0.81
  1. ICC intraclass correlation coefficients