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Table 7 Two-way mixed effect model (absolute agreement, single measure) Intraclass Correlations (ICC) between Child Self-Report and Parent Proxy-Report for PedsQL™ 4.0 Generic Core Scales by Age for Entire Sample

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 n Total Score Physical Health Psychosocial Health Emotional Functioning Social Functioning School Functioning
5 yrs 748 0.51* 0.36* 0.56* 0.62* 0.43* 0.45*
6 yrs 912 0.44* 0.28* 0.50* 0.60* 0.38* 0.44*
7 yrs 873 0.46* 0.31* 0.53* 0.59* 0.41* 0.42*
8 yrs 863 0.57* 0.46* 0.60* 0.63* 0.50* 0.48*
9 yrs 830 0.60* 0.48* 0.63* 0.63* 0.53* 0.57*
10 yrs 826 0.70* 0.60* 0.71* 0.69* 0.63* 0.63*
11 yrs 671 0.62* 0.52* 0.64* 0.63* 0.55* 0.59*
12 yrs 660 0.67* 0.57* 0.69* 0.67* 0.59* 0.64*
13 yrs 605 0.67* 0.57* 0.69* 0.68* 0.57* 0.60*
14 yrs 554 0.70* 0.63* 0.70* 0.67* 0.62* 0.64*
15 yrs 543 0.70* 0.60* 0.71* 0.69* 0.60* 0.66*
16 yrs 321 0.69* 0.62* 0.67* 0.64* 0.53* 0.66*
  1. Note: N = 8,406.
  2. Intraclass Correlation Coefficients (ICC) are designated as ≤ 0.40 poor to fair agreement, 0.41–0.60 moderate agreement, 0.61–0.80 good agreement, and 0.81–1.00 excellent agreement.
  3. *p < .001.