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Table 4 Agreement (weighted k) and cross-classification of quartiles of energy and nutrient intakes

From: Validation of a food frequency questionnaire as a tool for assessing dietary intake in cardiovascular disease research and surveillance in Bangladesh

Nutrient

Unadjusted data

Energy-adjusted data

Weighted k (95% CI)

Exact agreement (%)

Exact agreement + Adjacent (%)

Disagreement (%)

Weighted k (95% CI)

Exact agreement (%)

Exact agreement + Adjacent (%)

Disagreement (%)

Energy (kcal)

0.582 (0.495; 0.669)

53.42

95.2

4.79

–

Protein (g)

0.455 (0.354; 0.555)

45.89

87.67

12.33

0.137 (0.020; 0.255)

30.14

69.87

30.14

Fat (g)

0.231 (0.116; 0.345)

31.51

76.03

23.97

0.477 (0.381; 0.572)

43.84

91.79

8.22

Carbohydrate (g)

0.542 (0.452; 0.632)

49.32

94.53

5.42

0.353 (0.249; 0.458)

36.99

83.62

14.38

Vitamin A (μg)

0.263 (0.150; 0.377)

33.56

78.68

21.23

0.135 (0.015; 0.255)

33.56

70.55

29.45

β carotene (μg)

0.229 (0.107; 0.351)

38.62

73.79

26.21

0.269 (0.151; 0.388)

40.41

76.71

23.29

Vitamin D (μg)

−0.049 (−0.163; 0.064)

19.18

60.96

39.04

0.030 (−0.086; 0.147)

25.34

65.75

34.25

Vitamin E (mg)

0.27 (0.156; 0.384)

34.97

78.33

21.68

0.377 (0.274; 0.481)

39.04

84.25

15.75

Vitamin C (mg)

0.246 (0.134; 0.359)

33.56

75.34

24.66

0.052 (−0.071; 0.175)

28.77

65.76

34.25

Thiamine (mg)

0.412 (0.309; 0.515)

41.10

86.99

13.01

0.292 (0.180; 0.403)

36.30

80.14

19.86

Riboflavin (mg)

0.346 (0.238; 0.454)

39.04

82.19

17.81

0.150 (0.028; 0.272)

34.25

71.24

28.77

Niacin (mg)

0.371 (0.263; 0.480)

41.38

82.07

17.93

0.175 (0.052; 0.298)

34.93

72.6

27.40

Pyridoxine (mg)

0.549 (0.460; 0.638)

51.37

93.15

6.85

0.143 (0.023; 0.263)

32.19

69.86

30.14

Folate (μg)

0.331 (0.225; 0.438)

38.36

79.46

20.55

0.060 (−0.062; 0.182)

30.14

64.39

35.62

Calcium (mg)

0.228 (0.109; 0.346)

36.30

74.66

25.34

0.016 (−1.00; 0.133)

23.40

62.44

33.56

Iron (mg)

0.359 (0.246; 0.473)

43.15

80.14

19.86

0.181 (0.059; 0.303)

35.62

72.61

27.40

Magnesium (mg)

0.523 (0.427; 0.620)

51.37

90.41

9.59

0.096 (−0.024; 0.216)

32.19

66.44

33.56

Phosphorus (mg)

0.447 (0.344; 0.551)

45.89

88.36

11.64

0.055 (− 0.063; 0.173)

28.08

62.33

37.67

Potassium (mg)

0.433 (0.334; 0.533)

42.47

88.36

11.64

0.236 (0.119; 0.354)

34.93

77.4

22.60

Sodium (mg)a

0.469 (0.361; 0.571)

51.03

85.51

14.48

0.440 (0.327; 0.552)

50.00

82.88

17.12

Zinc (mg)

0.096 (−0.30; 0.223)

31.51

68.5

31.51

0.142 (0.018; 0.267)

32.88

69.87

30.14

Mean

0.349

40.62

81.92

18.07

0.191

34.15

73.03

26.68

  1. Weighted k was performed between Last FFQ & average of 24-h;aincluded cooking salt
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Nutrition Journal

ISSN: 1475-2891

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