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Table 2 Differences in purchases of common checkout foods per household per percentage market share by checkout food policy status

From: Socio-economic and age variations in response to supermarket-led checkout food policies: a repeated measures analysis

  Ratio of geometric means (95% confidence intervals)
Variable Level Model 1a Model 2b Model 3c
Checkout food policy (ref = none) Vague or inconsistent 0.96 (0.87;1.06) 1.07 (0.90;1.27) 1.06 (0.89;1.27)
Clear & consistent 0.86 (0.78;0.96) 1.16 (0.96;1.41) 0.79 (0.65;0.96)
Year (ref = 2013) 2014 0.97 (0.90;1;04) 1.01 (0.93;1.09) 0.97 (0.89;1.06)
2015 1.06 (0.98;1.14) 1.13 (1.03;1.24) 1.07 (0.97;1.18)
2016 1.10 (1.01;1.20) 1.20 (1.09;1.32) 1.11 (1.00;1.24)
2017 1.12 (1.03;1.22) 1.19 (1.08;1.32) 1.13 (1.01;1.26)
Supermarket shopper mean age (years) 1.02 (0.92;1.12) 1.00 (0.90;1.11) 1.01 (0.91;1.11)
Supermarket shopper mean social grade (5 = most affluent) 0.48 (0.15;1.50) 0.39 (0.11;1.34) 0.36 (0.11;1.21)
Age (ref = <27y) 28-34y   1.26 (1.11;1.43)  
35-44y   1.90 (1.67;2.17)  
45-54y   2.22 (1.95;2.52)  
55-64y   2.08 (1.82;2.37)  
>64y   1.83 (1.60;2.08)  
Checkout food policy * age (ref = Vague or inconsistent, all age groups) Vague or inconsistent, <28y   1.07 (0.90;1.27)  
Vague or inconsistent, 28-34y   1.08 (0.91;1.28)  
Vague or inconsistent, 35-44y   1.01 (0.85;1.20)  
Vague or inconsistent, 45-54y   0.99 (0.83;1.17)  
Vague or inconsistent, 55-64y   0.97 (0.82;1.15)  
Vague or inconsistent, >64y   0.86 (0.72;1.01)  
Checkout food policy * age (ref = Clear & consistent, all age groups) Clear & consistent, <28y   1.16 (0.96;1.41)  
Clear & consistent, 28-34y   1.06 (0.88;1.29)  
Clear & consistent, 35-44y   0.86 (0.71;1.05)  
Clear & consistent, 45-54y   0.77 (0.64;0.94)  
Clear & consistent, 55-64y   0.80 (0.66;0.98)  
Clear & consistent, >64y   0.77 (0.63;0.93)  
Social grade (ref = AB) C1    1.12 (0.98;1.28)
C2    0.91 (0.80;1.04)
D    0.99 (0.87;1.13)
E    1.00 (0.87;1.13)
Checkout food policy * social grade (ref = Vague or inconsistent, all social grade groups) Vague or inconsistent, AB    1.06 (0.89;1.27)
Vague or inconsistent, C1    0.94 (0.79;1.12)
Vague or inconsistent, C2    1.03 (0.87;1.23)
Vague or inconsistent, D    0.96 (0.81;1.15)
Vague or inconsistent, E    0.84 (0.71;1.01)
Checkout food policy * social grade (ref = Clear & consistent, all social grade groups) Clear & consistent, AB    0.79 (0.65;0.96)
Clear & consistent, C1    0.74 (0.61;0.91)
Clear & consistent, C2    1.05 (0.86;1.29)
Clear & consistent, D    0.96 (0.79;1.18)
Clear & consistent, E    0.79 (0.65;0.97)
  1. aModel 1 adjusted for year, supermarket shopper mean age, and supermarket shopper mean social grade. bModel 2 adjusted for year, supermarket shopper mean age, supermarket shopper mean social grade, age group and multiplicative interaction between age group and checkout food policy status. cModel 3 adjusted for year, supermarket shopper mean age, supermarket shopper mean social grade, social grade and multiplicative interaction between social grade and checkout food policy status