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Table 4 Effects of varying price promotion labels on food purchases in the web-based supermarket – results two-way ANCOVA analyses a

From: Effects of different discount levels on healthy products coupled with a healthy choice label, special offer label or both: results from a web-based supermarket experiment

Type of label

Special offer

Healthy choice

  

B

Lower 95% CI

Upper 95% CI

B

Lower 95% CI

Upper 95% CI

N

Special offer

-

-

-

4.16

−1.21

9.53

Unhealthy

Combined label b

−1.88

−7.10

3.34

2.28

−3.27

7.82

N Healthy

Special offer

-

-

-

1.92

−2.98

6.96

 

Combined label

2.13

−2.70

6.97

4.12

−1.01

9.26

Total items

Special offer

-

-

-

6.15

−1.85

14.2

 

Combined label

0.25

−7.54

8.04

6.40

−1.86

14.7

Total

Special offer

-

-

-

3,013

−4,573

10,600

Calories

Combined label

12.4

−7,367

7,392

3,026

−4,808

10,860

N healthy

Special offer

-

-

-

2.04

−1.64

5.71

excl F&V c

Combined label

1.06

−2.52

4.63

3.09

−0.70

6.89

% Healthy

Special offer

-

-

-

−3.36

−9.86

3.13

 

Combined label

6.00

−0.32

12.32

2.64

−4.07

9.34

% Healthy

Special offer

-

-

-

−0.40

−4.95

4.16

excl F&V c

Combined label

3.03

−1.40

7.46

2.63

−2.07

7.34

Vegetables

Special offer

-

-

-

−219

−998

560

(gram)

Combined label

436

−322

1,193

217

−587

1,021

Fruit

Special offer

-

-

-

137

−620

895

(gram)

Combined label

−60.9

−797

676

76.4

−705

858

% budget

Special offer

-

-

-

−6.91

−14.3

0.50

Spent

Combined label

8.99*

1.78

16.2

2.08

−5.58

9.73

  1. Data were measured in 2010 in the Netherlands. Participants included a community sample (n = 109).
  2. a. Results of two-way ANCOVA including the fixed factors level of discount, type of promotion label and the interaction discount x promotion label.
  3. b. Combined label is ‘special offer & healthy choice’.
  4. c. Healthy excl. means number of healthy products excluding fruits and vegetables.
  5. * significant at p < .05.
  6. ** significant at p < .01.