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Table 6 Geometric mean at first dietary recall, percent difference in means over all recalls, limits of agreement and intraclass correlation coefficients for nutrient intake estimated from myfood24 and interviewer-based 24-h recalls

From: Validity of an online 24-h recall tool (myfood24) for dietary assessment in population studies: comparison with biomarkers and standard interviews

 

myfood24

n = 208

Interviewer-based 24-h recall

n = 197

   

Geometric mean (95% CI)

Geometric mean (95% CI)

% Difference in meansa

% Limits of agreementa

Intraclass correlation

Nutrient intake:

 Total energy intake (MJ)

7.5 (7.1, 7.9)

8.5 (8.1, 8.9)

−10% (− 14%, − 6%)

− 63% to + 118%

0.51 (0.48, 0.54)

 Fat (g)

68 (64, 73)

82 (77, 88)

−14% (−18%, − 9%)

− 74% to + 182%

0.42 (0.40, 0.45)

 Saturated fatty acids per 100 g food (g)

23 (21, 25)

28 (25, 30)

−13% (− 19%, − 8%)

− 79% to + 263%

0.40 (0.38, 0.43)

 Monounsaturated fatty acids per 100 g food (g)

24 (22, 26)

28 (26, 30)

− 14% (− 19%, − 8%)

− 78% to + 238%

0.40 (0.38, 0.43)

 Polyunsaturated fatty acids per 100 g food (g)

12 (11, 13)

14 (13, 15)

−11% (−17%, −5%)

− 80% to + 303%

0.39 (0.36, 0.41)

 Protein (g)

72 (68, 78)

78 (73, 82)

−9% (− 14%, − 5%)

− 68% to + 158%

0.45 (0.42, 0.48)

 Carbohydrate (g)

198 (186, 211)

224 (213, 236)

−12% (−17%, − 7%)

− 70% to + 162%

0.54 (0.51, 0.56)

 Starch (g)

107 (99, 116)

117 (110, 126)

− 9% (− 15%, − 3%)

− 79% to + 263%

0.44 (0.41, 0.46)

 Total sugars (g)

73 (67, 80)

92 (86, 98)

−20% (− 25%, − 15%)

−80% to + 216%

0.46 (0.43, 0.49)

 Alcohol (g)

1.3 (1.0, 1.6)

1.5 (1.2, 2.0)

−9% (− 23%, + 7%)

− 98% to + 4177%

0.38 (0.35, 0.40)

 Englyst fibre (g)

14 (13, 15)

15 (14, 16)

−14% (− 19%, − 9%)

−75% to + 199%

0.43 (0.41, 0.46)

 Cholesterol (g)

0.17 (0.15, 0.20)

0.21 (0.18, 0.24)

−12% (− 20%, − 3%)

− 91% to + 793%

0.37 (0.35, 0.39)

 Sodium (g)

2.3 (2.1, 2.5)

2.4 (2.2, 2.6)

−4% (− 10%, + 2%)

− 76% to + 283%

0.44 (0.41, 0.47)

 Potassium (g)

2.7 (2.5, 2.9)

3.1 (3.0, 3.3)

− 14% (−18%, − 10%)

− 69% to + 137%

0.48 (0.45, 0.51)

 Calcium (g)

0.68 (0.63, 0.74)

0.83 (0.77, 0.89)

−7% (− 22%, − 12%)

−79% to + 223%

0.46 (0.43, 0.49)

 Phosphorous (g)

1.2 (1.1, 1.3)

1.4 (1.3, 1.4)

−12% (− 16%, −8%)

−68% to + 143%

0.51 (0.48, 0.53)

 Iron (mg)

11.3 (10.6, 12.0)

12.3 (11.6, 13.0)

−10% (−14%, − 5%)

− 70% to + 170%

0.46 (0.43, 0.49)

 Copper (mg)

1.8 (1.7, 1.9)

1.8 (1.7, 1.8)

−2% (−6%, + 2%)

− 63% to + 162%

0.42 (0.39, 0.45)

 Zinc (mg)

8.6 (8.0, 9.2)

10.0 (9.4, 10.6)

−10% (−14%, −4%)

−72% to + 197%

0.46 (0.43, 0.48)

 Selenium (μg)

38 (33, 42)

44 (40, 48)

−13% (−20%, −6%)

− 86% to + 445%

0.43 (0.40, 0.45)

 Iodine (μg)

85 (75, 96)

128 (116, 140)

−27% (− 33%, −9%)

−91% to + 509%

0.44 (0.42, 0.47)

 Retinol (μg)

143 (114, 179)

218 (181, 262)

−27% (− 36%, − 15%)

− 98% to + 2188%

0.37 (0.35, 0.40)

 Vitamin D (μg)

2.1 (1.9, 2.4)

2.2 (1.9, 2.5)

−3% (− 13%, + 7%)

−91% to + 908%

0.37 (0.35, 0.39)

 Vitamin E (mg)

7.7 (6.9, 8.5)

9.7 (8.9, 10.5)

−19% (− 25%, −12%)

−86% to + 381%

0.43 (0.40, 0.46)

 Thiamin (mg)

1.9 (1.8, 2.0)

1.9 (1.9, 2.0)

−6% (−9%, −2%)

− 61% to + 129%

0.46 (0.43, 0.49)

 Niacin (mg)

18.7 (17.4, 20.2)

20.0 (18.5, 21.5)

−5% (−10%, + 1%)

−75% to + 265%

0.41 (0.38, 0.43)

 Vitamin B6 (mg)

2.2 (2.1, 2.3)

2.5 (2.4, 2.7)

−10% (−14%, −7%)

− 65% to 127%

0.42 (0.39, 0.45)

 Vitamin B12 (μg)

3.4 (3.1, 3.9)

5.2 (4.8, 5.8)

−27% (− 33%, − 21%)

−90% to + 422%

0.40 (0.38, 0.43)

 Folate (mg)

.22 (.20, .24)

.25 (.24, .27)

−14% (− 21%, −11%)

−78% to + 215%

0.45 (0.42, 0.48)

 Pantothenic acid (mg)

4.6 (4.3, 4.9)

5.9 (5.5, 6.2)

−20% (− 24%, − 16%)

−74% to + 150%

0.43 (0.41, 0.46)

 Biotin (μg)

30 (28, 33)

37 (35, 40)

−19% (−25%, −13%)

−81% to + 240%

0.45 (0.42, 0.48)

 Vitamin C (mg)

59 (51, 69)

76 (66, 86)

−28% (− 36%, −20%)

−94% to + 765%

0.45 (0.42, 0.47)

  1. aThe difference in means and limits of agreement relate to the ratio of geometric means because of log transformation and are presented as % differences