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Table 3 PedsQL™ 4.0 Generic Core Scales Psychosocial 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 696 0.82 73.16 16.30 0.0 3.9 81.56 13.76 0.0 11.6 8.40* 0.61
6 yrs 914 0.82 74.06 16.13 0.0 5.6 79.91 14.40 0.0 9.8 5.85* 0.41
7 yrs 870 0.83 69.14 16.68 0.0 0.0 78.55 14.73 0.0 8.7 9.41* 0.64
8 yrs 867 0.86 74.27 15.53 0.0 2.4 81.53 14.25 0.0 10.3 7.26* 0.51
9 yrs 829 0.87 73.01 16.90 0.0 2.6 81.20 14.99 0.0 8.8 8.19* 0.55
10 yrs 829 0.87 75.44 16.82 0.0 3.5 82.09 14.06 0.0 10.5 6.65* 0.47
11 yrs 675 0.89 75.77 16.41 0.0 2.8 84.32 13.45 0.0 11.1 8.55* 0.64
12 yrs 672 0.88 75.86 16.14 0.0 1.8 82.20 14.45 0.0 13.0 6.33* 0.44
13 yrs 610 0.89 74.46 16.69 0.0 5.4 82.34 14.69 0.0 12.0 7.87* 0.54
14 yrs 562 0.88 73.99 16.20 0.0 5.4 83.98 13.28 0.0 12.6 9.99* 0.75
15 yrs 556 0.88 73.89 15.31 0.0 1.3 82.72 14.21 0.0 14.9 8.83* 0.62
16 yrs 328 0.88 74.21 16.36 0.0 1.7 83.98 13.03 0.0 10.8 9.78* 0.75
  1. Note: Total N = 8,408 for reliability, Total N = 8,324 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).