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Table 2 PedsQL™ 4.0 Generic Core Scales Physical Health Summary Score: Child Self-Report Reliability and Validity

From: How young can children reliably and validly self-report their health-related quality of life?: An analysis of 8,591 children across age subgroups with the PedsQL™ 4.0 Generic Core Scales

Age Reliability Validity
    Chronic Health Condition Healthy Sample   
  n α Mean SD % Floor % Ceiling Mean SD % Floor % Ceiling Chronic vs. Healthy Difference Chronic vs. Healthy Effect Size
5 yrs 753 0.72 77.65 19.42 0.0 11.6 86.34 13.38 0.0 25.7 8.69* 0.65
6 yrs 928 0.70 80.31 17.20 0.0 16.7 86.18 13.23 0.0 23.8 5.87* 0.44
7 yrs 885 0.73 75.28 19.18 0.0 8.1 85.52 13.73 0.0 26.0 10.24* 0.75
8 yrs 875 0.79 77.47 17.73 0.0 10.7 87.36 13.77 0.0 28.8 9.88* 0.72
9 yrs 838 0.83 76.37 18.45 0.0 10.7 88.43 14.80 0.0 32.4 12.06* 0.81
10 yrs 837 0.82 77.47 19.34 0.0 13.6 88.03 13.37 0.0 30.6 10.56* 0.79
11 yrs 681 0.84 78.34 19.29 0.0 10.5 88.03 13.30 0.0 29.0 9.68* 0.73
12 yrs 679 0.83 77.92 18.84 0.0 12.4 87.13 13.95 0.0 26.7 9.21* 0.66
13 yrs 614 0.84 76.16 19.19 0.0 11.6 87.83 13.57 0.0 34.0 11.67* 0.86
14 yrs 570 0.87 74.37 22.05 0.0 11.3 89.00 13.20 0.0 30.6 14.62* 1.11
15 yrs 560 0.85 77.21 18.58 0.0 10.9 88.59 13.55 0.0 34.9 11.38* 0.84
16 yrs 331 0.87 75.55 21.75 0.0 12.4 89.13 12.74 0.0 30.2 13.58* 1.07
  1. Note: Total N = 8,551 for reliability, Total N = 8,325 for validity.
  2. Higher values equal better health-related quality of life.
  3. % Floor/Ceiling = the percentage of scores at the extremes of the scaling range.
  4. Effect sizes are designated as small (.20), medium (.50), and large (.80).
  5. *p < .001 (independent samples t-test).