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

Table 4 PedsQL™ 4.0 Generic Core Scales Emotional Functioning Scale Score: Parent Proxy-Report Reliability and Validity

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	0.75	75.38	18.46	0.5	15.7	84.55	14.00	0.0	25.4	9.17*	0.66
3 yrs	1,242	0.77	75.28	18.07	0.0	14.8	83.48	14.52	0.1	22.2	8.20*	0.56
4 yrs	1,181	0.78	73.17	19.70	0.0	12.4	84.72	13.95	0.0	25.8	11.55*	0.83
5 yrs	976	0.79	71.17	20.59	0.8	10.5	79.76	15.88	0.1	17.9	8.59*	0.54
6 yrs	1,123	0.78	73.41	19.86	0.8	16.5	80.11	15.94	0.0	19.0	6.70*	0.42
7 yrs	1,082	0.81	69.74	21.77	0.4	13.3	79.64	16.85	0.1	21.1	9.90*	0.59
8 yrs	1,025	0.81	69.95	20.47	0.3	12.6	78.98	17.94	0.1	22.9	9.03*	0.50
9 yrs	968	0.81	69.10	20.35	0.7	9.4	78.88	17.98	0.3	19.8	9.78*	0.54
10 yrs	979	0.82	69.26	20.95	0.3	12.9	79.48	18.00	0.3	23.7	10.22*	0.57
11 yrs	784	0.83	67.42	21.88	0.7	8.2	80.46	18.02	0.0	24.8	13.04*	0.72
12 yrs	769	0.83	68.34	20.78	0.0	9.6	79.63	17.86	0.4	22.2	11.29*	0.63
13 yrs	702	0.84	68.43	21.39	0.7	10.7	80.32	18.39	0.0	24.1	11.89*	0.65
14 yrs	646	0.81	67.03	21.61	0.4	11.8	80.43	16.95	0.0	23.5	13.40*	0.79
15 yrs	620	0.85	69.31	21.96	0.8	10.0	79.14	18.86	0.3	26.8	9.83*	0.52
16 yrs	363	0.85	66.25	22.54	0.5	10.6	80.89	18.04	0.0	21.2	14.64*	0.81

Note: Total N = 13,750 for reliability, Total N = 13,004 for validity.
Higher values equal better health-related quality of life.
% Floor/Ceiling = the percentage of scores at the extremes of the scaling range.
Effect sizes are designated as small (.20), medium (.50), and large (.80).
*p < .001 (independent samples t-test).

ISSN: 1477-7525