Health questionnaire on back care knowledge and spine disease prevention for 6–10 years old children: development and psychometric evaluation

Table 4 Test-retest reliability of the Health Questionnaire on Back Care and Spine Disease Prevention Knowledge for 6–10 years old children

	Mean test (SD) (point)	Mean retest (SD) (point)	Difference between test, retest (SD) (point)	ICC	CI 95%		p	SEM (point)	MDC95 (point)
	Mean test (SD) (point)	Mean retest (SD) (point)		ICC	lower	upper	p	SEM (point)	MDC95 (point)
1	2.063 (2.639)	2.413 (2.558)	−0.350 (0.808)	0.975	0.970	0.979	p < 0.001	0.411	1.139
2	0.851 (0.950)	0.952 (0.910)	−0.102 (0.456)	0.936	0.923	0.947	p < 0.001	0.235	0.652
3	0.706 (0.830)	0.877 (0.830)	−0.171 (0.482)	0.908	0.889	0.923	p < 0.001	0.252	0.698
4	1.240 (1.214)	1.382 (1.182)	−0.143 (0.544)	0.946	0.935	0.955	p < 0.001	0.278	0.771
5	0.849 (0.951)	0.937 (0.906)	−0.089 (0.459)	0.935	0.922	0.946	p < 0.001	0.237	0.656
6	0.788 (0.409)	0.801 (0.399)	−0.013 (0.254)	0.890	0.868	0.908	p < 0.001	0.134	0.372
7	0.330 (0.471)	0.564 (0.496)	−0.233 (0.438)	0.742	0.690	0.785	p < 0.001	0.246	0.681
Total	6.827 (5.979)	7.927 (5.577)	−1.099 (1.218)	0.989	0.987	0.991	p < 0.001	0.606	1.680

CI confidence interval, ICC intraclass correlation coefficient, SEM standard error of measurement, MDC95 minimal detectable change at 95%

ISSN: 1471-2474