Table 6 Wald chi-square and contrast estimates (incidence rate ratios) from separate negative binomial regression models stratified by country examining the association between exposure to general fast food marketing and fast food intake among youth in six countries

Intercept

2.85 (0.0913)

1.56 (0.2111)

0.10 (0.7575)

0.2686 (0.0410)^a

0.01 (0.9196)

11.64 (0.0006)^a

Age

56.13 (< 0.0001)^a

16.96 (< 0.0001)^a

13.93 (0.0002)^a

0.0325 (< 0.0001)^a

21.52 (< 0.0001)^a

17.88 (< 0.0001)^a

Sex

 Male

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 Female

11.92 (0.0006)^a

0.90

(0.85, 0.96)^a

15.43 (< 0.0001)^a

0.83 (0.76, 0.91)^a

18.85 (< 0.0001)^a

0.81

(0.73, 0.89)^a

0.13 (0.7200)

0.99

(0.92, 1.06)

1.19 (0.2762)

0.96

(0.90, 1.03)

5.62 (0.0178)^a

0.86

(0.76, 0.97)^a

Ethnicity

 Majority

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 Minority

17.79 (< 0.0001)^a

1.15

(1.08, 1.22)^a

5.89 (0.0152)^a

1.15

(1.03, 1.29)^a

10.30 (0.0013)^a

1.26

(1.09, 1.45)^a

5.32 (0.0210)^a

1.09

(1.01, 1.17)^a

20.39 (< 0.0001)^a

1.23

(1.13, 1.35)^a

2.34 (0.1264)

1.15

(0.96, 1.37)

Income Adequacy

 Not enough

money

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 Enough

money

0.65 (0.4214)

0.97

(0.90, 1.05)

0.57 (0.4506)

1.04 (0.94, 1.15)

2.05 (0.1525)^a

0.93

(0.83, 1.03)

10.58 (0.0011)^a

1.14

(1.05, 1.23)^a

44.46 (< 0.0001)^a

1.31

(1.21, 1.42)^a

1.72 (0.1897)

1.10

(0.96, 1.25)

General Exposure to FF Marketing

 Never

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  ≥ 2x/week

25.62 (< 0.0001)^a

1.32

(1.19, 1.48)^a

0.31 (0.5787)

0.97 (0.84, 1.10)

19.13 (< 0.0001)^a

1.40

(1.20, 1.63)^a

6.80 (0.0091)^a

1.21

(1.05, 1.41)^a

5.99 (0.0144)^a

1.26

(1.05, 1.52)^a

21.61 (< 0.0001)^a

1.90

(1.45, 2.48)^a

  ≤ 1x/week

9.77 (0.0018)^a

1.21

(1.07, 1.37)^a

1.09 (0.2961)

0.92

(0.78, 1.08)

15.80 (< 0.0001)^a

1.40

(1.19, 1.65)^a

1.48 (0.2232)

1.11

(0.94, 1.31)

0.87 (0.3519)

1.10

(0.90, 1.34)

12.96 (0.0003)^a

1.70

(1.27, 2.27)^a