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Table 6 Model fit in confirmatory factor analyses testing the CHU9D one-factor structure among school children in grades 1–9 and stratified by school stages (child and adult algorithms) (n = 473)

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

  RMSEA CFI TLI SRMR
CHU9D (child algorithm)
 All 0.05 0.95 0.94 0.04
School stages
 Grades 1–3 0.09 0.85 0.80 0.07
 Grades 1–3, adjusted1 0.07 0.89 0.85 0.06
 Grades 4–6 0.00 1.00 1.06 0.04
 Grades 7–9 0.06 0.94 0.92 0.05
CHU9D (adult algorithm)
 All 0.04 0.96 0.95 0.04
School stages
 Grades 1–3 0.08 0.82 0.76 0.06
 Grades 1–3, adjusted1 0.07 0.88 0.83 0.06
 Grades 4–6 0.00 1.00 1.08 0.04
 Grades 7–9 0.03 0.98 0.98 0.05
  1. CFI comparative fit index, RMSEA root mean square error of approximation, SRMR standardized root mean square residual, TLI Tucker–Lewis index
  2. CFI and TLI ≥ 0.90 considered acceptable and ≥ 0.95 excellent model fit
  3. RMSEA ≤ 0.8 considered acceptable and ≤ 0.5 good model fit
  4. SRMR ≤ 0.8 considered acceptable model fit
  5. 1Correlations between dimensions “worried” and “sad” allowed as suggested by the modification indices