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Table 2 Numbers and proportions of unpacked and pre-packed labeled food products purchased in the three arms (N = 3382 participants overall)

From: The impact of the Nutri-Score front-of-pack nutrition label on purchasing intentions of unprocessed and processed foods: post-hoc analyses from three randomized controlled trials

Type of products No label Reference Intakes Nutri-Score P Nutri-Score vs no label Nutri-Score vs Reference Intakes Reference Intakes vs no label
Difference [95%CI] P Difference [95%CI] P Difference[95%CI] P
Number of products
Pre-packed foodsa
  Nutri-Score Ab 7.56 ± 8.12 7.97 ± 6.63 6.03 ± 6.14 < 0.0001 −1.53 (−2.22;-0.84) < 0.0001 − 1.94 (− 2.62;-1.26) < 0.0001 0.41 (− 0.27;1.09) 0.3
  Nutri-Score Bb 3.02 ± 4.04 3.30 ± 4.08 2.56 ± 3.94 < 0.0001 −0.46 (− 0.86;-0.07) 0.01 − 0.74 (− 1.13;-0.35) < 0.0001 0.28 (− 0.12;0.67) 0.2
  Nutri-Score Cb 3.55 ± 3.84 3.83 ± 4.06 3.05 ± 3.42 < 0.0001 −0.50 (− 0.87;-0.13) 0.004 − 0.78 (− 1.14;-0.41) < 0.0001 0.28 (− 0.09;0.65) 0.2
  Nutri-Score Db 5.03 ± 5.96 5.36 ± 5.21 3.66 ± 4.45 < 0.0001 −1.37 (− 1.88;-0.86) < 0.0001 −1.70 (−2.21;-1.19) < 0.0001 0.33 (− 0.18;0.84) 0.3
  Nutri-Score Eb 1.59 ± 2.30 1.84 ± 2.72 1.18 ± 1.98 < 0.0001 −0.41 (− 0.64;-0.18) < 0.0001 −0.66 (− 0.89;-0.43) < 0.0001 0.25 (0.02;0.49) 0.03
Unpacked foodsc
  No label 8.08 ± 10.09 8.31 ± 6.84 6.18 ± 5.46 < 0.0001 −1.90 (− 2.64;-1.16) < 0.0001 − 2.13 (− 2.85;-1.4) < 0.0001 0.23 (− 0.51;0.96) 0.6
Proportions
Pre-packed foodsa
  Nutri-Score Ab 27.09 ± 16.66 26.79 ± 15.35 24.39 ± 17.07 < 0.0001 −2.71 (−4.33;-1.08) 0.0003 −2.40 (− 4.00;-0.80) 0.001 −0.30 (−1.92;1.31) 0.9
  Nutri-Score Bb 10.65 ± 12.16 9.85 ± 9.06 8.79 ± 9.21 < 0.0001 −1.87 (−2.88;-0.86) < 0.0001 − 1.06 (− 2.06;-0.07) 0.04 −0.81 (− 1.81;0.20) 0.1
  Nutri-Score Cb 12.49 ± 11.69 12.10 ± 10.57 14.91 ± 16.63 < 0.0001 2.43 (1.12;3.74) < 0.0001 2.81 (1.52;4.10) < 0.0001 −0.38 (− 1.69;0.92) 0.7
  Nutri-Score Db 16.89 ± 12.35 16.96 ± 12.63 13.56 ± 12.36 < 0.0001 −3.33 (−4.57;-2.10) < 0.0001 − 3.40 (− 4.61;-2.18) < 0.0001 0.06 (− 1.17;1.29) 1.0
  Nutri-Score Eb 5.18 ± 6.96 5.95 ± 9.41 4.73 ± 8.33 0.002 −0.45 (− 1.28;0.37) 0.4 −1.22 (−2.03;-0.41) 0.002 0.77 (−0.05;1.59) 0.09
Unpacked foodsc
  No label 27.69 ± 17.75 28.36 ± 17.54 33.63 ± 26.70 < 0.0001 5.93 (3.88;7.99) < 0.0001 5.27 (3.25;7.29) < 0.0001 0.66 (−1.38;2.70) 0.6
  1. a Pre-packed foods were categorized with the Nutri-Score. These products were the only foods from the experimental online supermarket carrying a Nutri-Score label given the European regulation
  2. b Nutri-Score classifies products in 5 categories of overall nutritional quality between A healthier to E less healthy
  3. c Unpacked foods included all food products from the experimental online supermarket, that were unpacked and therefore non-labeled given the European regulation
  4. Values correspond to mean ± standard deviation
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