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Table 4 Cross-classification into quintiles between FFQ-derived estimates and biomarkers (Energy-adjusted data)

From: Use of food frequency questionnaire to assess relationships between dietary habits and cardiovascular risk factors in NESCAV study: validation with biomarkers

 

Men

 

Women

 

FFQ-estimated daily dietary intakes

Biomarkers

Same (%)

Within one (%)

Extreme (%)

ĸ

Same (%)

Within one (%)

Extreme (%)

ĸ

Food groups

Fruits (g/day)

β-carotene (mg/L)

20.96

54.9

5.01

0.07

24.28

56.25

5.05

0.1

Vegetables (g/day)

β-carotene (mg/L)

23.23

59.22

5.47

0.11

25.72

55.77

6.91

0.07

Fruits and vegetables (g/day)

β-carotene (mg/L)

21.64

57.63

4.56

0.1

23.32

54.81

5.05

0.08

Micro-nutrients

Vitamin B12 (μg)

B12 (pg/ml)

23.56

54.04

6.24

0.07

23.54

55.34

6.31

0.09

Vitamin B9 (μg)

Serum folates (ng/ml)

25.35

64.52

3.23

0.21

27.1

65.95

2.64

0.23

Vitamin B9 (μg)

Erythrocyte folates (ng/ml)

25.87

62.82

4.85

0.19

29.88

61.45

2.65

0.21

Vitamin D (μg)

25-OH Vitamine D (ng/ml)

29.2

68.14

7.08

0.19

37.7

67.21

0

0.37

Vitamin E (mg)

α-tocopherol (mg/L)

25.29

60.69

6.44

0.11

21.65

54.98

6.33

0.06

Iron (mg)

Iron (μmol/L)

19.59

51.03

9.11

-0.02

18.55

54.21

6.99

0.03

Iron (mg)

Ferritin (ng/ml)

23.69

55.13

8.2

0.05

19.95

53.12

7.93

0

Iron (mg)

Transferrin (g/L)

20.96

53.99

7.97

0.03

21.45

53.98

7.23

0.03

Iodine (μg)

Iode/Creatinine ratio (μg/g)

21.5

58.42

4.21

0.1

24.56

59.5

4.81

0.14

Sodium (mg)

Urine sodium (mmol/L)

22.81

53.51

6.58

0.06

19.08

54.02

5.52

0.05

β-carotene (μg)

β-carotene (mg/L)

24.36

56.84

4.87

0.13

22.79

59.55

4.41

0.13

  1. K: Kappa coefficient.