Cognitive ability and self-control in relation to dietary habits, physical activity and bodyweight in adolescents

Table 3 Hierarchal regression for control-variables, self-control and psychometric cognitive ability predicting different health behaviours.

	Vegetables			Unhealthy foods			Money
Variables	B	SB	β	B	SE B	β	B	EB	β
Step 1: Control variables added
Age	-.04	.07	-.05	-.19	.07	-.19**	.24	.17	.10
Sex	-.29	.14	-.15*	.46	.13	.24**	1.32	.35	.26**
Own or rent the house	-.02	.23	-.01	.45	.22	.15*	-.37	.59	-.05
Family income	-.11	.13	-.07	.09	.13	.05	.31	.33	.07
Kind of house	.01	.07	.01	.06	.07	.06	.39	.19	.15*
Occupation primary wage earner	.17	.07	.20**	-.12	.07	-.13	-.07	.18	-.03
Step 2: Cognitive ability added
Age	-.04	.07	-.04	-.19	.07	-.20**	.23	.17	.09
Sex	-.27	.13	-.15*	.44	.13	.23**	1.28	.34	.26**
Own or rent house	-.09	.23	-.03	.51	.22	.17*	-.19	.59	-.02
Family income	-.13	.13	-.08	.10	.12	.07	.36	.33	.09
Kind of house	.02	.07	.02	.06	.07	.06	.37	.19	.14*
Occupation primary wage earner	.16	.07	.19*	-.11	.07	-.12	-.04	.18	-.02
Cognitive ability	.03	.01	.20**	-.02	.01	-.17**	-.06	.02	-.18**
Step 3: Self-control added
Age	-.04	.07	-.04	-.19	.06	-.20**	.23	.17	.09
Sex	-.27	.13	-.14*	.44	.13	.23**	1.27	.34	.26**
Own or rent the house	-.06	.23	-.02	.48	.22	.16*	-.33	.58	-.04
Family income	-.14	.13	-.09	.11	.12	.07	.40	.32	.10
Kind of house	.03	.07	.03	.04	.07	.05	.31	.19	.12
Occupation primary wage earner	.16	.07	.19*	-.10	.07	-.12	-.04	.18	-.02
Cognitive ability	.03	.01	.19*	-.02	.01	-.16*	-.06	.02	-.17**
Self-control	.01	.00	.11	-.01	.00	-.11	-.03	.01	-.20**

For vegetables,R² = .05 (ns) for step 1; ΔR² = .04 (p< .01) for step 2; ΔR² = .01 (ns) for step 3. For unhealthy foods, R² = .13 (p < .001) for step 1; ΔR² = .03(p< .01) for step 2; ΔR² = .01 (ns) for step 3. For money, R² = .12 (p < .001) for step 1; ΔR² = .03 (p < .01) for step 2; ΔR² = .04 (p < .01) for step 3.

ISSN: 1479-5868