BMC Public Health

Table 3 Cronbach alpha and correlation between KINDL-R test scores (child's self-report and parent proxy report)

From: Effects of phone versus mail survey methods on the measurement of health-related quality of life and emotional and behavioural problems in adolescents

		Children's self-report						Parent's proxy-report
		PHY	PSY	SEL	FAM	FRI	SCH	PHY	PSY	SEL	FAM	FRI	SCH
		C1	C2	C3	C4	C5	C6	P1	P2	P3	P4	P5	P6
	alpha	0.58	0.51	0.62	0.74	0.40	0.52	0.68	0.57	0.68	0.66	0.57	0.51
C1	0.61		0.38	0.28	0.30	0.25	0.32	0.37	0.23	0.22	0.15	0.11	0.21
C2	0.62	0.41		0.22	0.33	0.41	0.30	0.19	0.26	0.13	0.16	0.19	0.13
C3	0.72	0.36	0.38		0.23	0.31	0.20	0.09	0.16	0.20	0.11	0.07	0.13
C4	0.71	0.25	0.38	0.26		0.23	0.30	0.14	0.17	0.16	0.32	0.08	0.12
C5	0.60	0.32	0.48	0.35	0.25		0.22	0.13	0.20	0.15	0.10	0.26	0.06
C6	0.60	0.44	0.36	0.33	0.32	0.24		0.13	0.16	0.18	0.16	0.01	0.41
P1	0.67	0.46	0.23	0.22	0.12	0.19	0.18		0.48	0.39	0.23	0.28	0.28
P2	0.69	0.30	0.35	0.25	0.27	0.34	0.21	0.47		0.53	0.39	0.36	0.40
P3	0.71	0.30	0.27	0.34	0.23	0.26	0.28	0.39	0.56		0.37	0.42	0.37
P4	0.75	0.16	0.18	0.17	0.46	0.14	0.18	0.29	0.48	0.43		0.22	0.33
P5	0.70	0.22	0.28	0.22	0.18	0.51	0.07	0.32	0.53	0.42	0.34		0.18
P6	0.64	0.29	0.26	0.20	0.20	0.15	0.54	0.30	0.39	0.41	0.31	0.24

Lower triangular matrix = mail; upper triangular matrix = phone administration
^a statistically significant deviation after Fisher-Z Transformation
PHY = Physical; PSY = Psychological; SEL = Self-Esteem; FAM = Family; FRI = Friends; SCH = School;
Alpha for the self-report total was 0.84 mail vs. 0.79 phone;
Alpha for the parent proxy report total was 0.87 mail vs. 0.84 phone;
Correlation between self-report and proxy report total Score was r = 0.54 (mail) and 0.39 (phone)

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ISSN: 1471-2458

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