Cluster-randomized, controlled evaluation of a teacher led multi factorial school based back education program for 10 to 12-year old children

Table 1 Anthropometric data of study participants at baseline measurement, (Mean, standard deviation and p-value separated by group at baseline)

	Group	N	Mean	SD	p-values, t-test, Chi-squared-test
Age (years)	Intervention	87	10.59	.438	.296
Age (years)	Control	85	10.52	.426	.296
Height (m)	Intervention	90	1.44	.074	.710
Height (m)	Control	86	1.45	.065	.710
Body weight (kg)	Intervention	90	37.49	8.10	.640
Body weight (kg)	Control	86	38.04	7.26	.640
Body-mass-index (kg/m2)	Intervention	90	17.71	2.40	.718
Body-mass-index (kg/m2)	Control	86	17.84	2.50	.718
Performance Matthias-test (sec)	Intervention	90	48.61	14.84	.058
Performance Matthias-test (sec)	Control	87	52.82	14.51	.058
Amount of physical activity ¹	Intervention	78			.655
Amount of physical activity ¹	Control	72			.655
Status of the back muscles²	Intervention	89			.313
Status of the back muscles²	Control	84			.313
Status of the Spine³	Intervention	85			.637
Status of the Spine³	Control	77			.637

ISSN: 1471-2431