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Table 3 Percentage for cross-classification of energy-adjusted nutrient intakes into quartiles estimated from the Food Frequency Questionnaire (FFQ) and 24-Hour Recalls (24-HDRs)

From: Assessing the validity of a self-administered food-frequency questionnaire (FFQ) in the adult population of Newfoundland and Labrador, Canada

Nutrienta

Women

Men

 

Same quartile (%)

Adjacent quartile (%)

One quartile apart (%)

Grossly misclassified (%)

Same quartile (%)

Adjacent quartile (%)

One quartile apart (%)

Grossly misclassified (%)

Energy (kcal)

24.8

43.1

24.2

7.8

40.5

33.3

21.4

4.8

Protein (g)

33.3

41.2

18.3

7.2

23.8

45.2

23.8

7.1

Carbohydrate (g)

32.7

45.1

19.0

3.3

40.5

45.2

12.0

2.3

Dietary Fibre (g)

40.5

38.6

17.6

3.3

38.1

42.9

19.0

0.0

Total Fat (g)

34.6

35.3

23.5

6.5

31.0

42.9

16.6

9.5

Saturated Fat (g)

32.7

42.5

17.6

7.2

28.6

50.0

14.3

7.1

Monounsaturated Fat (g)

37.9

33.3

20.3

8.5

38.1

45.2

9.5

7.1

Polyunsaturated Fat (g)

34.0

32.7

24.2

9.1

33.3

42.9

14.3

9.5

Cholesterol (mg)

32.7

36.6

24.2

6.5

40.5

40.5

11.9

7.1

Vitamin A(RAE)

30.1

42.5

20.3

7.2

26.2

47.6

21.4

4.8

Carotene (RE)

37.9

39.2

16.3

6.5

31.0

40.5

21.4

7.1

Vitamin D (IU)

38.6

39.2

18.3

3.9

23.8

57.1

14.3

4.8

Calcium (mg)

31.4

45.8

19.0

3.9

33.3

52.4

9.5

4.8

  1. a Classification was performed using log-transformed nutrient values.