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

  Nutri-Score A^b

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 B^b

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 C^b

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 D^b

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 E^b

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

  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

  Nutri-Score A^b

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 B^b

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 C^b

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 D^b

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 E^b

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

  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