Table 2 Mean ± SD of food groups in each questionnaire (g/day) as well as mean differences (95%CI) between FFQ1 vs. 24 h and FFQ2 vs. 24 h

Whole Grain

24.6 ± 29.0

17.6 ± 18.5

27.2 ± 27.7

-0.61 (-2.99, 1.76)

-5.94 (-7.99, -3.89)

White Grain

366 ± 170

362 ± 160

305 ± 118

58.4 (49.3, 67.5)

45.4 (36.1, 54.6)

Beans

28.1 ± 16.2

21.6 ± 12.2

23.0 ± 10.9

4.79 (3.58, 6.00)

-1.77 (-2.78, -0.77)

Fish

4.36 ± 3.80

3.86 ± 3.31

5.41 ± 2.98

-0.73 (-1.19, -0.27)

-1.23 (-1.68, -0.78)

Red Meat

17.2 ± 12.8

14.7 ± 11.8

23.5 ± 13.3

-5.99 (-7.02, -4.97)

-8.30 (-9.34, -7.27)

Processed Meat

5.10 ± 4.64

4.98 ± 4.73

3.66 ± 2.49

1.84 (0.84, 2.83)

2.13 (1.10, 3.16)

Chicken

20.0 ± 14.6

20.1 ± 14.6

23.4 ± 12.4

-4.03 (-5.11, -2.94)

-3.21 (-4.33,-2.10)

Egg

19.7 ± 10.9

18.7 ± 11.1

18.5 ± 10.2

1.29 (0.40, 2.17)

-0.09 (-1.00, 0.82)

Cheese

18.4 ± 10.3

11.7 ± 6.78

13.6 ± 7.05

4.27 (3.57, 4.96)

-0.34 (-0.97, 0.29)

Dairy

235 ± 135

218 ± 122

123 ± 72.2

103 (95.0, 112)

91.3 (83.4, 99.2)

Vegetables

448 ± 181

388 ± 156

268 ± 103

172 (161, 184)

108 (97.8, 119)

Juice

8.35 ± 6.77

6.78 ± 5.45

9.33 ± 3.50

-1.09 (-2.67, 0.49)

-2.16 (-3.76, -0.56)

Fruit

343 ± 201

311 ± 183

265 ± 114

69.5 (56.1, 82.9)

37.3(24.2, 50.4)

Dried Fruit

14.8 ± 12.4

13.8 ± 10.9

7.77 ± 5.73

6.77 (5.90, 7.65)

5.89 (5.03, 6.74)

Solid oil

11.9 ± 11.3

9.60 ± 9.16

8.56 ± 6.44

3.26 (2.55, 3.98)

1.08(0.50, 1.65)

Liquid Oil

6.01 ± 4.27

5.56 ± 4.05

4.93 ± 3.18

0.77 (0.44, 1.11)

0.39 (0.10, 0.67)

Olive/ Olive Oil

0.42 ± 0.42

0.48 ± 0.51

0.38 ± 0.17

0.18 (0.04, 0.33)

0.19 (-0.02, 0.40)

Nuts

5.90 ± 5.16

5.48 ± 4.15

4.17 ± 3.15

1.63 (1.28, 1.98)

1.21 (0.88, 1.54)

Sugar

28.8 ± 19.2

24.1 ± 16.0

19.6 ± 11.01

8.28 (7.19, 9.36)

3.85 (2.93, 4.76)

Sweets

17.2 ± 12.4

15.5 ± 10.6

19.8 ± 13.0

-2.93 (-4.00, -1.86)

-4.31 (-5.40, -3.23)

Sweet Drinks

38.0 ± 35.9

31.3 ± 30.8

35.3 ± 24.5

3.51 (0.38, 6.64)

10.8 (6.34, 15.17)

Tea

570 ± 303

559 ± 308

500 ± 233

72.1 (54.6, 89.7)

59.7 (42.7, 76.7)

Salt

4.25 ± 2.51

4.02 ± 2.16

2.68 ± 1.01

1.43 (1.27, 1.59)

1.17 (1.01, 1.32)