Table 8.

Linear regression analysis (backward) of the behavioural conduct 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
Behavioural conduct	2005–2006	adolescent status	−10.512	4.556	−0.328	−2.307	0.029 *	−19.85	−1.18	0.413
		physical fitness	23.668	6.312	0.533	3.750	0.001 *	10.74	36.60
	2007–2008	age	−1.160	1.437	−0.135	−0.808	0.425	−4.08	1.76	−0.010
	2009–2011	adolescent status	8.297	5.166	0.295	1.606	0.120	−2.30	18.90	0.053
	2012–2014	sex	−16.685	5.841	−0.478	−2.856	0.009 *	−28.77	−4.60	0.435
		age	−9.977	2.196	−1.405	−4.544	<0.001 *	−14.52	−5.44
		adolescent status	31.483	9.493	0.894	3.317	0.003 *	11.85	51.12
		BMI-SDS	−13.831	6.975	−0.376	−1.983	0.059	−28.26	0.60
		migration background	−17.257	7.433	−0.396	−2.322	0.029 *	−32.63	−1.88
		media consumption	10.595	3.304	0.529	3.207	0.004 *	3.76	17.43
	2015–2017	migration background	−20.648	7.727	−0.402	−2.672	0.011 *	−36.31	−4.99	0.139
	2018–2020	migration background	−10.326	6.436	−0.252	−1.604	0.117	−23.35	2.70	0.039

Final models of the backward linear regression analysing sub-domains of self-concept as the 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).