Skip to main content

Table 3 Sales (mean ± SE) of food items with energy labels; during 5 weeks of each intervention periods compared with corresponding 5 weeks pre-interventions in the previous year

From: The Effect of Energy Labelling on Menus and a Social Marketing Campaign on Food-Purchasing Behaviours of University Students

  

Baseline period

kJ labelling only period

Baseline period

kJ labelling + social marketing campaign period

Food

Energy (kJ)

5 weeks pre-kJ labelling in the previous year

5 weeks of kJ labelling only

Difference

Relative change %a

P value

5 weeks pre-kJ + social marketing campaign in the previous year

5 weeks of kJ + social marketing campaign

Difference

Relative change %d

P value

 <-------------------------------------mean ± standard error------------------------------------->

Plate of chips

2882

39 ± 0.38

38.5 ± 0.38

−0.51

−1.33

0.15

40.7 ± 0.42

40.1 ± 0.34

−0.61

−1.52

0.29

Chicken Schnitzel Burger

3260

8.4 ± 0.09

7.8 ± 0.08

−0.60

−7.66

0.13

8.2 ± 0.11

7 ± 0.04

−1.27

−18.20

0.11

Chicken Schnitzel & Chips

3430

9.4 ± 0.16

14.2 ± 0.13

4.77

33.65

0.05b

9.6 ± 0.06

14.2 ± 0.27

4.61

32.50

0.04b

Nachos

3500

4.5 ± 0.04

4.4 ± 0.05

−0.08

−1.94

0.15

5 ± 0.08

4.4 ± 0.06

−0.63

−14.21

0.11

Chicken Caesar Burger

3580

7 ± 0.08

5.3 ± 0.06

−1.66

−31.36

0.06

6.8 ± 0.08

4.6 ± 0.04

−2.27

−49.65

0.01b

Manning Burger

3690

12 ± 0.11

11.5 ± 0.12

−0.43

−3.69

0.15

10.7 ± 0.11

11.4 ± 0.06

0.62

5.50

0.21

Fish n Chips

3950

3.3 ± 0.03

3.1 ± 0.03

−0.23

−7.52

0.13

2.8 ± 0.03

3.1 ± 0.08

0.34

11.02

0.21

Steak & Chips

4000

7.7 ± 0.06

8.7 ± 0.08

1.01

11.58

0.13

6.6 ± 0.06

8 ± 0.08

1.42

17.83

0.02b

Grill Burger

5500

8.8 ± 0.06

6.5 ± 0.07

−2.26

−34.57

0.05b

9.6 ± 0.06

7.4 ± 0.03

−2.23

−30.22

0.00b

  1. Difference represents the change in percentage of sales between the intervention and baseline periods (corresponding weeks the year before)
  2. aRelative Change % = ((Intervention - Pre)/Intervention)*100
  3. bSignificant change in sales P ≤ 0.05; analysis to determine significance between intervention and comparative weeks periods performed using Mann–Whitney U test for non-normally distributed data