Reliability and validity of the Japanese version of the Pediatric Quality of Life Inventory Infant Scales

Journal of Patient-Reported Outcomes

Table 4 Test–retest reliability of the Japanese version of the PedsQL Infant Scales

	N = 52
	n	Mean	SD	95%CI		t^a	P value ^a	ICC^b	P value^b
	n	Mean	SD	Upper	Lower	t^a	P value ^a	ICC^b	P value^b
Infants aged 1–12 months
Physical functioning	23	1.93	18.25	− 5.96	9.82	0.51	0.62	0.71	< 0.01
Physical symptoms	23	0.25	9.97	− 4.06	4.56	0.12	0.90	0.85	< 0.01
Emotional functioning	23	− 1.99	11.12	− 6.80	2.82	− 0.86	0.40	0.73	< 0.01
Social functioning	23	2.72	14.08	− 3.37	8.81	0.93	0.36	0.73	< 0.01
Cognitive functioning	23	− 3.26	11.44	− 8.21	1.69	− 1.37	0.19	0.70	< 0.01
Physical health summary	23	0.73	11.11	− 4.07	5.53	0.32	0.76	0.84	< 0.01
Psychosocial health summary	23	− 3.28	7.65	− 6.59	0.02	− 2.06	0.05	0.80	< 0.01
Total	23	-0.25	8.79	− 4.05	3.55	− 0.14	0.89	0.85	< 0.01
Infants aged 13–24 months
Physical functioning	29	0.38	14.40	− 5.10	5.86	0.14	0.89	0.49	< 0.01
Physical symptoms	28	1.07	16.81	− 5.45	7.59	0.34	0.74	0.65	< 0.01
Emotional functioning	29	− 2.19	9.10	− 5.65	1.27	− 1.30	0.21	0.86	< 0.01
Social functioning	28	0.00	8.50	− 3.30	3.30	0.00	1.00	0.56	< 0.01
Cognitive functioning	27	0.34	6.66	− 2.30	2.97	0.26	0.79	0.77	< 0.01
Physical health summary	28	0.39	13.59	− 4.88	5.67	0.15	0.88	0.66	< 0.01
Psychosocial health summary	29	− 1.28	6.35	− 3.69	1.14	− 1.08	0.29	0.85	< 0.01
Total	29	-0.32	7.94	− 3.34	2.70	− 0.22	0.83	0.81	< 0.01

SD, standard deviation
^aPaired t test
^bIntra-class correlation coefficients between the initial test and retest scores in a one-way random effects model