Table 4.

Linear regression analysis (backward) of the physical appearance 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
Physical appearance	2005–2006	media consumption	−6.510	2.204	−0.481	−2.954	0.006 *	−11.02	−2.00	0.205
	2007–2008	age	−3.728	1.186	−0.466	−3.143	0.004 *	−6.14	−1.32	0.423
		BMI-SDS	−15.173	4.992	−0.420	−3.040	0.005 *	−25.33	−5.02
		media consumption	6.150	2.408	0.357	2.553	0.015 *	1.25	11.05
	2009–2011	BMI-SDS	−17.225	5.840	−0.605	−2.950	0.007 *	−29.23	−5.22	0.226
		physical fitness	−27.541	10.140	−0.557	−2.716	0.012 *	−48.39	−6.70
	2012–2014	age	−6.791	1.972	−0.988	−3.443	0.002 *	−10.85	−2.74	0.343
		adolescent status	22.076	9.294	0.648	2.375	0.025 *	2.97	41.18
		BMI-SDS	−23.201	6.178	−0.651	−3.756	0.001 *	−35.90	−10.50
	2015–2017	BMI-SDS	−13.787	5.334	−0.391	−2.585	0.014 *	−24.59	−2.98	0.130
	2018–2020	physical fitness	−7.611	3.937	−0.299	−1.933	0.061	−15.58	0.36	0.066

Final models of the backward linear regression analysing sub-domains of self-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 different time periods (n = 205). * significant results (p < 0.05).