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Table 3 Comparison of the mean number of food and beverage advertisements per station, according to socioeconomic status

From: An audit of food and beverage advertising on the Sydney metropolitan train network: regulation and policy implications

  low SES medium SES high SES p-value
(n = 65) (n = 89) (n = 24)
Mean distance from the CBD (km) 23.9 16.0 13.3  
Range (km) 3.9–51.4 0.2–51.9 2.9–28.1  
Total number of advertisements 1196 4855 880  
Mean number (SD) of advertisements per station 18.4 (42.4) 54.6 (129.7) 36.7 (57.0) 0.02
Number (%) of food and beverage advertisements 568 (47.5) 1078 (15.6) 269 (30.6)  
Mean number (SD) of food and beverage advertisements per station 8.7 (19.7) 12.1 (22.4) 11.2 (11.7) 0.59
Estimated marginal mean (SE) 12.1 (1.3) 9.4 (1.1) 11.9 (2.1) 0.24
Number (%) of core food advertisements 55 (4.6) 75 (1.5) 24 (2.7)  
Mean number (SD) of core food advertisements per station 0.9 (1.9) 0.8 (1.9) 1.0 (1.3) 0.93
Estimated marginal mean (SE) 1.1 (0.2) 0.7 (0.2) 1.0 (0.3) 0.15
Number (%) of discretionary food advertisements 501 (41.9) 892 (18.4) 222 (25.2)  
Mean number (SD) of discretionary food advertisements per station 7.7 (18.2) 10.0 (19.4) 9.3 (10.2) 0.73
Estimated marginal mean (SE) 10.5 (1.3) 7.8 (1.1) 10.0 (2.1) 0.26
Number (%) of miscellaneous food advertisements 12 (1.0) 111 (2.3) 23 (2.6)  
Mean number (SD) of miscellaneous food advertisements per station 0.2 (0.8) 1.3 (3.5) 1.0 (1.9) 0.02
Estimated marginal mean (SE) 0.6 (0.3) 1.0 (0.2) 0.9 (0.4) 0.57
  1. n values indicate number of train stations. p-value for comparison of means between low, medium and high SES areas