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Table 4 Validation study: cross-classification of intakes of food and nutrients based on the average of two FFQs and the average of three 24-h recalls completed by 123 pregnant Chinese women, January 2013 to April 2014

From: Reproducibility and relative validity of a semi-quantitative food frequency questionnaire for Chinese pregnant women

Food groups or nutrients

Same quintile (%)

Same or adjacent quintile (%)

Extreme quintile (%)

Food groups

   

Cereals

27.6

56.1

4.1

Meats

32.5

74.8

1.6

Fish

29.3

72.4

1.6

Eggs

32.5

68.3

1.6

Beans

22.8

60.2

0.8

Vegetables

27.6

66.7

4.1

Fruits

30.9

71.5

0.0

Nuts

35.0

68.3

3.3

Milk & milk products

40.7

80.5

0.0

Beverages

23.6

51.2

3.3

Nutrients

   

Energy

32.5

69.9

1.6

Protein

39.0

74.8

1.6

High quality protein

35.8

70.7

1.6

Fat

41.5

70.7

2.4

Carbohydrate

26.8

69.1

2.4

Dietary fiber

33.3

67.5

1.6

Cholesterol

35.8

69.9

0.8

Vitamin A

34.1

66.7

1.6

Thiamin

33.3

74.0

2.4

Riboflavin

36.6

73.2

2.4

Vitamin C

28.5

59.3

0.8

Vitamin E

26.8

67.5

1.6

Choline

30.1

64.2

2.4

Niacin

29.3

74.0

0.8

Folate

29.3

69.9

3.3

Calcium

35.8

63.4

2.4

Phosphorus

31.7

72.4

3.3

Potassium

27.6

74.8

3.3

Sodium

22.8

58.5

4.1

Magnesium

31.7

71.5

2.4

Iron

26.8

66.7

3.3

Zinc

25.2

66.7

2.4

Selenium

32.5

77.2

0.0

Copper

29.3

63.4

0.0

Iodine

22.0

56.1

7.3