To what extent do dietary costs explain socio-economic differences in dietary behavior?

Nutrition Journal

Table 2 Results regarding the mediating role of dietary cost in the association between individual and household educational level and the DHD15-index and DASH score

Independent variable	Mediator	Dependent variable	Total effect (c-path)		Direct effect (c’-path)		Indirect effect		Proportion mediated
Independent variable	Mediator	Dependent variable	β	95%CI	β	95%CI	β	Bootstrap 95%CI	Proportion mediated
	Dietary cost (€/d)	DHD15- index (score)	Individual educational level
Middle vs. low			3.96*	2.93; 5.00	3.78*	2.75; 4.82	0.18*	0.10; 0.28	4.5
High vs. low			9.07*	8.37; 9.77	8.86*	8.16; 9.57	0.20*	0.11; 0.30	2.2
High vs. middle			5.10*	4.01; 6.19	5.07*	4.00; 6.16	0.02	−0.03; 0.09	N/A
			Household educational level
Middle vs. low			2.96*	1.91; 4.01	2.84*	1.79; 3.89	0.12*	0.05; 0.21	4.1
High vs. low			8.25*	7.59; 8.90	8.04*	7.37; 8.70	0.21*	0.11; 0.32	2.5
High vs. middle			5.20*	4.15; 6.24	5.28*	4.24; 6.33	0.09*	0.03; 0.16	1.7
		DASH diet (score)	Individual educational level
Middle vs. low			1.00*	0.71; 1.29	0.93*	0.64; 1.22	0.07*	0.04; 0.10	7.0
High vs. low			2.25*	2.06; 2.45	2.17*	1.98; 2.37	0.08*	0.05; 0.11	3.6
High vs. middle			1.25*	0.95; 1.56	1.24*	0.94; 1.54	0.01	−0.01; 0.03	N/A
			Household educational level
Middle vs. low			0.75*	0.46; 1.05	0.71*	0.41; 1.00	0.05*	0.03; 0.08	6.6
High vs. low			2.02*	1.84; 2.21	1.94*	1.76; 2.12	0.08*	0.05; 0.11	4.0
High vs. middle			1.27*	0.98; 1.56	1.23*	0.94; 1.52	0.03*	0.01; 0.06	2.4

Abbreviations: B beta regression coefficient, CI confidence interval, N/A Not Applicable
^aSample size for analyses with individual educational level is 9275
^bSample size for analyses with household educational level is 9282
*P < 0•05
All analyses were adjusted for age, sex, study center and energy intake
Proportion mediated was not calculated for non-significant indirect effects

ISSN: 1475-2891