Reliability and validity of Japanese versions of KIDSCREEN-27 and KIDSCREEN-10 questionnaires

Table 1 Mean T values of the children and differences by gender and age group

	8–11 years old					12–18 years old					Differences in mean T values
	Boys (n = 244)		Girls (n = 303)			Boys (n = 214)		Girls (n = 297)			Boys (n = 458)/Girls (n = 600)		8–11 years (n = 547)/12–18 years (n = 511)
Age, years; Mean, SD	9.2	0.9	9.2	0.9		14.4	1.7	14.5	1.6
Subjects with chronic illness	16	6.6^a	18	5.9		14	6.5	23	7.7
	Mean	SD	Mean	SD		Mean	SD	Mean	SD		Δ	d	Δ	d
J-KIDSCREEN-27
Physical Well-being	58.8	12.5	57.9	12.0		49.7	11.8	49.0	12.1		1.1	0.08	9.0	0.74
Psychological Well-being	54.5	13.0	56.2	12.5		46.9	10.3	48.8	12.6		−1.6	−0.13	7.4	0.60
Parent relations & Autonomy	48.6	11.7	49.4	10.3		46.5	9.9	49.4	10.5	*	−1.8	−0.17	0.9	0.08
Social support & Peers	51.6	11.3	55.1	11.0	*	49.1	11.3	53.9	11.7	*	−4.1	−0.36	1.6	0.14
School Environment	56.5	11.4	58.5	10.7	*	48.2	9.6	51.0	10.6	*	−2.2	−0.19	7.8	0.73
J-KIDSCREEN-10
General HRQOL Index	55.3	13.4	56.6	13.6		47.4	9.7	49.4	10.7	*	−1.5	−0.11	7.4	0.61

d (effect size) was calculated by dividing the mean difference by the overall standard deviation. A positive Δ or d indicates a higher HRQOL reported by boys or those in the younger age group (8–11 years). Values in bold indicate |d| > 0.20
* Statistically significant difference (p < 0.05) of mean scores noted between boys and girls in each age group by t test
^aPercentage of subjects with chronic illness

ISSN: 1347-4715