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Table 2 Difference in energy and nutrient intakes and Pearson’s correlation coefficients between the FFQ and 24-hour recalls (N=128)

From: Relative validity of the food frequency questionnaire used to assess dietary intake in the Leiden Longevity Study

 

FFQ

24-hour recall

 

Pearson's correlation coefficients

Nutrient

Mean

S.d.

Mean

S.d.

p-value a

Crude a

Adj a,b

Adj, deatt a,b,c

Energy (kcal)

1914

542

1891

427

0.95

0.55

-

0.65

Total protein (g)

72

22

76

19

0.02

0.51

0.50

0.61

Vegetable protein (g)

28

9

28

8

0.64

0.67

0.63

0.86

Animal protein (g)

44

16

48

16

0.002

0.49

0.54

0.60

Total fat (g)

76

28

70

21

0.05

0.39

0.43

0.50

Saturated fatty acids (g)

28

12

26

9

0.38

0.44

0.57

0.55

Monounsaturated fatty acids (g)

26

9

23

8

0.02

0.33

0.33

0.46

Polyunsaturated fatty acids (g)

16

7

14

5

<.0001

0.44

0.44

0.57

Trans fatty acids (g)

2

1

2

1

0.004

0.42

0.44

0.61

Linoleic acid (g)

13

6

11

5

0.0002

0.43

0.40

0.56

Alpha linolenic acid (g)

1.32

0.80

0.86

0.45

<.0001

0.21

0.21

0.29

EPA (g)

0.06

0.06

0.09

0.20

0.21

0.39

0.40

0.48

DHA (g)

0.09

0.09

0.14

0.26

0.15

0.36

0.38

0.50

Cholesterol (mg)

194

79

203

90

0.44

0.42

0.41

0.75

Total carbohydrates (g)

206

58

209

55

0.49

0.70

0.66

0.80

Mono- disaccharides (g)

102

34

102

36

0.85

0.61

0.50

0.69

Polysaccharides (g)

104

34

106

29

0.11

0.70

0.68

0.87

Dietary fiber (g)

23

7

21

7

0.01

0.66

0.59

0.82

Ethanol (g)

16

14

17

16

0.68

0.78

0.78

0.95

Calcium (mg)

982

489

986

316

0.21

0.56

0.59

0.67

Vitamin B1 (mg)

1.23

0.36

1.15

0.43

0.00

0.58

0.45

0.86

Vitamin B2 (mg)

1.58

0.64

1.51

0.47

0.26

0.58

0.52

0.69

Vitamin B6 (mg)

1.65

0.49

1.69

0.48

0.33

0.52

0.35

0.67

Vitamin B12 (ÎĽg)

4.43

2.23

4.52

4.20

0.28

0.43

0.41

0.72

Vitamin D (ÎĽg)

3.97

1.87

4.05

2.40

0.90

0.49

0.47

0.74

Vitamin E (mg)

13

5

11

5

0.001

0.38

0.36

0.46

Vitamin C (mg)

94

39

99

46

0.79

0.51

0.49

0.68

Lycopene (ÎĽg)

2373

3900

2025

3718

<.0001

0.46

0.48

1.26

Retinol activity equivalent (ÎĽg)

1023

618

771

499

<.0001

0.54

0.46

0.87

Folic acid equivalent (ÎĽg)

196

65

184

55

0.03

0.53

0.35

0.87

  1. a = Based on log-transformed values; b = Correlation coefficients were adjusted for energy intake; energy-adjusted intakes were calculated using the residual method; c = Correlation coefficients were de-attenuated (corrected for within-person variation [derived from crude, untransformed data] in the 24-hour recalls).
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Nutrition Journal

ISSN: 1475-2891

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