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

From: Parent proxy-report of their children's health-related quality of life: an analysis of 13,878 parents' reliability and validity across age subgroups using 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
2 yrs 1,290 0.87 77.68 24.25 1.0 24.4 90.04 15.07 0.2 38.9 12.36* 0.82
3 yrs 1,238 0.87 76.17 25.05 0.8 19.3 90.07 14.24 0.0 37.6 13.90* 0.98
4 yrs 1,184 0.89 76.01 24.91 1.8 19.8 89.23 17.00 0.0 42.6 13.22* 0.78
5 yrs 975 0.88 68.79 26.36 1.2 11.3 79.94 20.64 0.0 23.8 11.15* 0.54
6 yrs 1,119 0.87 73.31 23.87 0.4 14.0 80.37 20.76 0.0 21.9 7.06* 0.34
7 yrs 1,084 0.88 70.88 26.23 1.1 14.4 79.52 21.35 0.0 23.3 8.64* 0.40
8 yrs 1,025 0.88 74.25 23.98 0.6 15.0 82.91 19.93 0.0 31.1 8.66* 0.43
9 yrs 963 0.89 70.47 24.86 1.8 12.6 81.52 21.85 0.0 32.0 11.05* 0.51
10 yrs 973 0.88 72.13 24.29 0.9 14.1 84.18 19.11 0.2 32.1 12.05* 0.63
11 yrs 783 0.90 73.29 25.16 1.4 12.8 82.66 20.95 0.2 31.2 9.37* 0.45
12 yrs 765 0.89 69.33 25.30 0.4 8.5 82.36 20.86 0.0 27.6 13.03* 0.62
13 yrs 701 0.89 71.50 23.63 1.4 12.0 82.37 21.67 0.0 32.2 10.87* 0.50
14 yrs 646 0.90 69.70 24.99 0.7 8.6 84.52 19.86 0.0 31.3 14.82* 0.75
15 yrs 617 0.88 72.95 22.16 0.4 8.4 82.43 20.48 0.0 30.0 9.48* 0.46
16 yrs 361 0.89 69.01 25.74 0.5 9.6 85.61 18.07 0.0 31.5 16.60* 0.92
  1. Note: Total N = 13,724 for reliability, Total N = 13,004 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).