. 2021 Jun 2;18:71. doi: 10.1186/s12966-021-01139-2

Table 4.

Results from multiple linear models predicting the relative importance of ethical concern, familiarity and price motive dimensions^a

	Ethical concern				Familiarity				Price-cheap				Price-value
	B^b	95% CI	P	∆R^2c	B	95% CI	P	∆R²	B	95% CI	P	∆R²	B	95% CI	P	∆R²
Gender				.007***				.018***				.013***				.021***
Women	0.027	0.021, 0.033	<.001		−0.064	−0.073, − 0.055	<.001		− 0.061	−0.070, −0.051	<.001		−0.062	−0.069, −0.054	<.001
Men (ref.)
Age group				.049***				.007***				.026***				.015***
18–29 (ref.)
30–44	0.034	0.025, 0.042	<.001		−0.022	−0.035, −0.010	.001		−0.062	−0.076, −0.048	<.001		− 0.022	−0.034, −0.011	<.001
45–64	0.067	0.058, 0.075	<.001		−0.052	−0.065, −0.039	<.001		−0.101	−0.115, −0.087	<.001		−0.043	−0.054, −0.032	<.001
65–94	0.116	0.106, 0.127	<.001		−0.046	−0.061, −0.030	<.001		−0.133	−0.150, −0.116	<.001		−0.083	−0.96, −0.069	<.001
Marital status				.001***				<.001				.009***				<.001
Married/cohabiting (ref.)
Divorced/widowed	−0.015	−0.024, −0.007	<.001		−0.002	−0.014, 0.011	.80		0.061	0.047, 0.074	<.001		0.004	−0.007, 0.015	.65
Never married	−0.009	−0.017, −0.002	.019		0.013	0.001, 0.024	.027		0.038	0.026, 0.050	<.001		−0.006	−0.016, 0004	.26
Living situation				.002***				.001*				.005***				<.001
Alone	−0.009	−0.017, −0.002	.019		0.002	−0.009, 0.014	.67		0.022	0.010, 0.034	<.001		−0.003	−0.013, 0.007	.52
Two or more adults	0.007	<0.001, 0.014	.051		−0.010	−0.21, <0.001	.044		−0.021	−0.032, −0.010	<.001		0.001	−0.008, 0.010	.86
Adult(s) and child(ren) (ref.)
Education				.005***				.029***				.035***				.002***
Basic	−0.024	−0.037, −0.012	<.001		0.122	0.103, 0.141	<.001		0.150	0.129, 0.170	<.001		−0.030	−0.047, −0.013	<.001
Middle	−0.028	−0.036, −0.021	<.001		0.080	0.069, 0.090	<.001		0.107	0.095, 0.119	<.001		0.004	−0.006, 0.013	.46
Lower academic	−0.014	−0.021, −0.006	<.001		0.026	0.015, 0.037	<.001		0.059	0.047, 0.071	<.001		0.009	−0.001, 0.019	.079
Upper academic (ref.)
Household income				.001*				.014***				.077***				<.001
1st quartile	−0.009	−0.018, −0.001	.032		0.072	0.060, 0.085	<.001		0.195	0.182, 0.208	<.001		0.004	−0.007, 0.015	.49
2nd quartile	−0.009	−0.017, −0.002	.019		0.047	0.035, 0.058	<.001		0.120	0.107, 0.132	<.001		0.007	−0.004, 0.017	.21
3rd quartile	0.001	−0.009, 0.010	.91		0.017	0.004, 0.030	.013		0.069	0.055, 0.083	<.001		0.008	−0.004, 0.020	.21
4th quartile (ref.)
Household special diets				.024***				.010***				.008***				.002**
No special diet (ref.)
Lactose-free	0.012	0.005, 0.019	.001		−0.003	−0.014, 0.007	.52		−0.027	−0.039, −0.016	<.001		−0.011	−0.020, −0.002	.021
Gluten-free	0.024	0.013, 0.035	<.001		−0.014	−0.030, 0.003	.11		−0.048	−0.067, −0.030	<.001		−0.017	−0.032, −0.002	.025
Red-meat-free	0.059	0.046, 0.072	<.001		−0.072	−0.091, −0.053	<.001		− 0.067	−0.088, −0.045	<.001		−0.029	−0.047, −0.012	.001
Vegetarians	0.087	0.075, 0.099	<.001		−0.074	−0.091, −0.056	<.001		− 0.057	−0.076, −0.037	<.001		− 0.021	−0.037, −0.005	.009
Other	0.031	0.019, 0.043	<.001		−0.019	−0.036, −0.001	.036		−0.035	−0.054, −0.016	<.001		−0.004	−0.020, 0.011	.60

***P < .001, **P < .01, *P < .05

^aEach model includes age, gender and the given sociodemographic variable as predictors

^bB values are unstandardized regression coefficients

^c∆R² refers to increase in the model R² value after adding the given sociodemographic predictor to the age- and gender-adjusted model