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Table 2 Odds ratio for selecting a food as healthier if it has a) more favourable colour for a nutrient; b) more greens or more reds

From: Reds are more important than greens: how UK supermarket shoppers use the different information on a traffic light nutrition label in a choice experiment

  Univariate odds ratio (95 % confidence intervals) Multivariate odds ratio (95 % confidence intervals)
a) Favourable colours on individual nutrients 1  
 Total fat 5.31 (5.01, 5.62) 4.83 (4.41, 5.29)2
 Saturated fat 7.05 (6.61, 7.52) 7.31 (6.66, 8.02)2
 Total sugar 3.94 (3.74, 4.16) 5.16 (4.72, 5.64)2
 Salt 2.05 (1.96, 2.14) 7.11 (6.46, 7.81)2
b) More greens or more reds  
 More greens 7.84 (7.36, 8.35) 6.09 (5.61, 6.61)3
 More reds 0.07 (0.07, 0.08) 0.09 (0.08, 0.10)3
  1. 1For each nutrient, ‘favourable colour’ means a comparision of either ‘green: amber’, ‘green: red’ or ‘amber: red’, with equal weight placed on all such comparisons. 2Results are adjusted for superior colours on each of the other nutrients. 3Results are mutually adjusted for ‘more greens’ and ‘more reds’