Table 6.

Linear regression analysis (backward) of the social competence domain.

Domain	Periods of Analysis of Final Model		Unstandardized Coefficients		Standardized Coefficients	T	p-Value	95.0% Confidence Interval for B		Adjusted R2
			B	std. error	ß			lower limit	upper limit
Social competence	2005–2006	media consumption	−4.315	2.863	−0.269	−1.507	0.143	−10.17	1.54	0.041
	2007–2008	physical fitness	19.640	9.314	0.340	2.109	0.042 *	0.71	38.57	0.090
	2009–2011	BMI-SDS	13.887	7.460	0.337	1.862	0.074	−1.42	29.19	0.081
	2012–2014	age	−3.797	1.572	−0.617	−2.415	0.023 *	−7.04	−0.56	0.329
		adolescent status	17.552	7.731	0.575	2.270	0.032 *	1.63	33.47
		physical fitness	12.211	5.378	0.347	2.271	0.032 *	1.14	23.29
		media consumption	8.313	2.684	0.480	3.097	0.005 *	2.79	13.84
	2015–2017	adolescent status	−11.492	6.633	−0.284	−1.733	0.092	−24.96	1.97	0.271
		physical fitness	31.041	8.147	0.536	3.810	0.001 *	14.50	47.58
		media consumption	1.793	0.917	0.325	1.955	0.059	−0.07	3.65
	2018–2020	BMI-SDS	−12.029	6.762	−0.317	−1.779	0.083	−25.73	1.67	0.122
		physical fitness	−12.031	4.458	−0.481	−2.698	0.010 *	−21.06	−3.00

Final models of the backward linear regression analysing sub-domains-concept as dependent variable and the independent factors sex, age, BMI-SDS, adolescent status (<13 or ≥13 years old), migration background, media consumption in h/day, and physical fitness in watts/kg bodyweight in the different time periods (n = 205). * significant results (p < 0.05).