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Table 3 Estimated marginal means (SE) for vegetable and meat/fish consumption in grams for all three locations

From: Menu-engineering in restaurants - adapting portion sizes on plates to enhance vegetable consumption: a real-life experiment

 

Vegetable consumption in grams (plate)

Vegetable consumption in grams (total, incl. side dishes)

Meat/fish consumption in grams

Period

   

Control (n = 530)

61.7 (1.65)a

137.0 (2.65)a

211.1 (2.29)a

Intervention (n = 469)

115.5 (1.82)b

178.0 (2.92)b

183.1 (2.52)b

Location

   

Restaurant 1 (n = 129)

90.0 (2.89)a

166.2 (4.63)a

203.7 (4.01)a

Restaurant 2 (n = 324)

87.3 (1.81)a

159.3 (2.90)a

197.1 (2.51)b

Restaurant 3 (n = 546)

88.5 (1.40)a

147.0 (2.24)b

190.6 (1.94)b

Main effect intervention

F

(df1,df2)

Partial η 2

478.92***

(1, 993)

.325

108.2***

(1, 993)

.098

67.75***

(1, 993)

.064

Main effect location

F

(df1,df2)

Partial η 2

.35

(2, 993)

.001

9.97***

(2, 993)

.020

5.23**

(2, 993)

.010

Main effects intervention*location

F

(df1,df2)

Partial η 2

7.55**

(2, 993)

.015

2.87

(2, 993)

.006

9.31***

(2, 993)

.018

  1. Reported means are amount in grams (standard errors are reported in brackets); Means with a different superscript a, b indicate a significant difference (p < .05) (means are compared two at a time); *** p < .001; **p < .01; *p < .05