Table 2.
Energy density and nutrient content of the shopping baskets across the four experimental conditions.
| P−/L− (n = 218) |
P−/L+ (n = 218) |
P+/L− (n = 237) |
P+/L+ (n = 226) |
Labelling L+ vs. L− |
Proportion P+ vs. P− |
|
|---|---|---|---|---|---|---|
| ED (kcal/100 g) | 262 (29) |
257 (30) |
245 (27) |
241 (24) |
−4.2 (−7.8 to −0.6) |
−17 (−21 to −14) |
| Total energy (kcal) | 11295 (4274) |
10753 (3943) |
9980 (2005) |
10397 (4802) |
−67 (−734 to 601) |
−852 (−1519 to −184) |
| Energy from sugar (%) | 4.83 (1.21) |
5.02 (1.18) |
5.42 (1.26) |
5.57 (1.38) |
0.17 (−0.04 to 0.39) |
0.57 (0.36 to 0.79) |
| Energy from SFA (%) | 5.48 (1.07) |
5.44 (1.26) |
4.91 (1.06) |
4.80 (1.04) |
−0.07 (−0.26 to 0.12) |
−0.60 (−0.79 to −0.41) |
| Salt content (g/100 g) | 0.74 (0.11) |
0.74 (0.10) |
0.74 (0.09) |
0.76 (0.15) |
0.01 (−0.01 to 0.03) |
0.01 (−0.01 to 0.03) |
| Number of products | 11.4 (6.61) |
11.0 (4.94) |
10.3 (1.60) |
11.0 (4.89) |
0.21 (−0.62 to 1.04) |
−0.58 (−1.41 to 0.26) |
| Lower-ED choices (%) | 35.7 (15.4) |
42.3 (18.5) |
60.1 (17.2) |
63.1 (17.3) |
4.77 (1.81 to 7.73) |
22.6 (19.7 to 25.6) |
| Cost (GBP) | ||||||
| Total | 20.7 (9.35) |
20.6 (7.69) |
18.6 (3.73) |
19.8 (6.23) |
0.59 (−0.62 to 1.80) |
−1.42 (−2.63 to −0.21) |
| /100 g | 0.48 (0.11) |
0.50 (0.11) |
0.47 (0.10) |
0.48 (0.10) |
0.02 (−0.002 to 0.03) |
−0.02 (−0.04 to −0.003) |
| /100 kcal | 0.19 (0.05) |
0.20 (0.04) |
0.19 (0.05) |
0.20 (0.05) |
0.01 (0.001 to 0.02) |
0.005 (−0.003 to 0.01) |
Values are means (SDs) in the first four columns and parameters estimates (95% CI for energy density (ED) and 99% CIs for secondary outcomes; CIs not crossing zero indicate significant difference) for labelling and proportion factors from the models including labelling, proportion, level of education, level of education*labelling and level of education*proportion as predictors in the next two columns. SFA = saturated fat.