Table 1

Pearson's correlation coefficient between the first and second FFQs for all subjects

Nutrients

CFFQ

AFFQ

n = 89

n = 89


Energy (kcal/day)

0.73**

0.80**

Protein (g/day)

0.77**

0.73**

Total fat (g/day)

0.76**

0.71**

Carbohydrate (g/day)

0.67**

0.83**

Sodium (mg/day)

0.76**

0.75**

Potassium (mg/day)

0.77**

0.72**

Calcium (mg/day)

0.78**

0.78**

Magnesium (mg/day)

0.77**

0.79**

Phosphorous (mg/day)

0.79**

0.77**

Iron (mg/day)

0.74**

0.67**

Zinc (mg/day)

0.79**

0.76**

Copper (mg/day)

0.69**

0.75**

Manganese (mg/day)

0.72**

0.39**

Vitamin A (μgRE/day)

0.72**

0.72**

Vitamin D (mcg/day)

0.74**

0.65**

Alpha tocopherol (mg/day)

0.76**

0.73**

Vitamin K (mg/day)

0.82**

0.68**

Vitamins B1 (mg/day)

0.80**

0.78**

Vitamins B2 (mg/day)

0.82**

0.77**

Niacin (mg/day)

0.80**

0.77**

Vitamin B6 (mg/day)

0.82**

0.77**

Vitamin B12 (μg/day)

0.76**

0.71**

Folic acid (μg/day)

0.81**

0.67**

Pantothenic acid (mg/day)

0.84**

0.79**

Vitamins C (mg/day)

0.72**

0.61**

Cholesterol (mg/day)

0.80**

0.67**

Dietary fiber (g/day)

0.78**

0.77**

Saturated fatty acid (g/day)

0.81**

0.80**

Monounsaturated fatty acid (g/day)

0.78**

0.74**

Polyunsaturated fatty acid (g/day)

0.78**

0.72**

n-3 polyunsaturated fatty acid (mg/day)

0.56**

0.72**

n-6 polyunsaturated fatty acid (mg/day)

0.55**

0.71**

Myristic acid (mg/day)

0.71**

0.82**

Oleic acid (mg/day)

0.57**

0.74**

Linoleic acid (mg/day)

0.54**

0.71**

Alpha-linolenic acid (mg/day)

0.58**

0.70**

Arachidonic acid (mg/day)

0.61**

0.68**

Icosapentaenoic acid (mg/day)

0.56**

0.63**

Docosahexaenoic acid (mg/day)

0.55**

0.65**


‡: The data (Alpha tocopherol, Vitamin K, Vitamins B1, B2, Niacin, B6, and B12) were transformed by natural log to improve normality

CFFQ: Food frequency questionnaire for dietary assessment in children

AFFQ: Food frequency questionnaire for dietary assessment in adults

**: p < 0.01

Kobayashi et al. Nutrition Journal 2011 10:27   doi:10.1186/1475-2891-10-27

Open Data