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Table 3 PedsQL™ 4.0 Generic Core Scales Psychosocial 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 1,282 0.81 79.90 15.34 0.0 10.7 86.83 12.41 0.0 19.6 6.93* 0.56
3 yrs 1,239 0.81 77.32 16.29 0.0 7.8 86.41 12.16 0.1 16.0 9.09* 0.75
4 yrs 1,178 0.82 75.98 17.79 0.0 6.9 86.17 12.34 0.0 16.1 10.19* 0.83
5 yrs 897 0.87 71.66 18.30 0.4 2.3 79.87 15.15 0.0 8.8 8.21* 0.54
6 yrs 1,111 0.86 73.02 16.49 0.0 3.7 79.37 15.26 0.0 7.3 6.35* 0.42
7 yrs 1,063 0.88 69.61 18.56 0.0 3.0 78.08 16.11 0.0 8.9 8.47* 0.53
8 yrs 1,011 0.87 71.66 17.10 0.0 3.7 78.82 16.04 0.0 10.4 7.16* 0.45
9 yrs 958 0.87 68.98 17.68 0.4 0.7 77.39 16.81 0.0 9.2 8.41* 0.50
10 yrs 964 0.88 69.35 18.72 0.0 3.4 78.83 16.14 0.0 9.6 9.48* 0.59
11 yrs 769 0.88 70.18 18.13 0.0 3.2 80.00 16.22 0.0 11.0 9.82* 0.61
12 yrs 757 0.90 68.51 18.28 0.0 1.8 79.86 16.18 0.0 10.8 11.35* 0.70
13 yrs 693 0.89 70.91 18.45 0.0 2.4 79.07 17.18 0.0 11.3 8.16* 0.47
14 yrs 633 0.89 68.76 18.35 0.0 3.9 81.08 15.11 0.0 11.4 12.32* 0.82
15 yrs 611 0.89 70.22 17.85 0.4 1.2 79.62 16.51 0.0 15.9 9.40* 0.57
16 yrs 354 0.89 68.98 19.38 0.0 3.5 81.23 14.75 0.0 11.5 12.25* 0.83
  1. Note: Total N = 13,520 for reliability, Total N = 13,019 for validity.
  2. For the reliability analysis for the 2 to 4 age subgroups, items on the School Functioning Scale were excluded from the analysis given that toddlers do not necessarily attend school or daycare and thus, depending on whether their child was enrolled in school or daycare, parent proxy respondents were given the option of completing the School Functioning items. 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).