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Table 9 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 Healthy 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

558

0.46*

0.25*

0.56*

0.68*

0.43*

0.46*

6 yrs

703

0.43*

0.24*

0.53*

0.67*

0.40*

0.44*

7 yrs

635

0.42*

0.21*

0.54*

0.66*

0.40*

0.43*

8 yrs

575

0.55*

0.40*

0.62*

0.72*

0.51*

0.46*

9 yrs

553

0.57*

0.37*

0.64*

0.70*

0.56*

0.55*

10 yrs

533

0.68*

0.50*

0.73*

0.80*

0.64*

0.61*

11 yrs

400

0.52*

0.36*

0.60*

0.69*

0.48*

0.52*

12 yrs

405

0.63*

0.44*

0.70*

0.74*

0.57*

0.61*

13 yrs

320

0.58*

0.42*

0.66*

0.68*

0.55*

0.54*

14 yrs

296

0.56*

0.43*

0.64*

0.74*

0.54*

0.59*

15 yrs

284

0.67*

0.45*

0.76*

0.79*

0.59*

0.73*

16 yrs

137

0.60*

0.42*

0.68*

0.73*

0.46*

0.68*

  1. Note: N = 5,399.
  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.