Table 3 Descriptive statistics for total food purchases, and environmental and nutritional outcomes per household per week for the total population and the control and experimental conditions in the virtual supermarket
Total population (n = 533) | Control condition (n = 153) | Price condition (n = 133) | Information nudge condition (n = 126) | Combination condition (n = 121) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Purchases | ||||||||||
Purchased food items (n) | 39·7 | 16·4 | 40·5 | 15·5 | 37·6 | 14·7 | 41·8 | 17·3 | 38·6 | 15·7 |
of which meat (n) | 3·6 | 2·8 | 4·3 | 3·1 | 3·7 | 2·4 | 4·2 | 2·8 | 3·2 | 2·4 |
Environmental impact | ||||||||||
Greenhouse gas emission (kg CO2-eq) | 58·9 | 26·8 | 62·3 | 29·3 | 56·3 | 24·3 | 61·9 | 26·6 | 54·4 | 25·6 |
Land use (m2/year) | 38·3 | 19·6 | 39·6 | 21·4 | 37·1 | 18·5 | 40·1 | 17·5 | 36·2 | 20·2 |
Blue water consumption (m3) | 1·70 | 1·07 | 1·72 | 1·02 | 1·59 | 1·01 | 1·76 | 1·05 | 1·74 | 1·21 |
Nutritional outcomes | ||||||||||
Energy (kcal) | 32,054 | 16,164 | 33,043 | 18,007 | 30,710 | 14,050 | 33,750 | 16,072 | 30,517 | 15,896 |
Protein, En% | 12·8 | 3·6 | 12·7 | 3·5 | 12·8 | 3·4 | 13·0 | 3·8 | 12·8 | 3·9 |
Carbohydrates, En% | 47·5 | 10·3 | 47·7 | 10·7 | 47·1 | 10·8 | 46·9 | 9·6 | 48·2 | 10·0 |
Mono- and disaccharides, En% | 20·9 | 8·0 | 21·8 | 8·7 | 20·2 | 7·8 | 20·3 | 7·5 | 20·9 | 7·8 |
Fatty acids, En% | 35·7 | 11·6 | 35·6 | 11·0 | 35·9 | 11·9 | 36·3 | 11·1 | 35·0 | 12·3 |
Saturated fatty acids, En% | 11·6 | 3·7 | 11·7 | 3·3 | 11·5 | 4·2 | 11·7 | 3·5 | 11·2 | 3·8 |
Fibre, En% | 2·3 | 0·8 | 2·2 | 0·8 | 2·3 | 0·8 | 2·3 | 0·8 | 2·5 | 0·9 |
Salt (g) (median (IQR)) | 81·2 | 65·4 | 82·9 | 64·8 | 79·5 | 60·0 | 89·0 | 64·9 | 73·9 | 66·2 |