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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