Table 3

Correlation coefficients of nutrients between the WDRs and the CFFQ for young children and adolescents

Nutrients

Young children (n = 48)

Adolescents (n = 41)

crude value^a

adjusted value^b

crude value^a

adjusted value^b

Energy (kcal/day)

0.66**

0.33*

Protein (g/day)

0.66**

0.19

0.37*

0.23

Total fat (g/day)

0.51**

0.50**

0.14

0.19

Carbohydrate (g/day)

0.66**

0.38**

0.39*

0.22

Sodium (mg/day)

0.40**

0.17

0.23

0.26

Potassium (mg/day)

0.63**

0.45**

0.24

0.44**

Calcium (mg/day)

0.58**

0.34*

0.28

0.26

Magnesium (mg/day)

0.60**

0.69**

0.13

0.19

Phosphorous (mg/day)

0.65**

0.29*

0.30

0.15

Iron (mg/day)

0.47**

0.16

0.20

0.47**

Zinc (mg/day)

0.59**

0.21

0.33*

0.16

Copper (mg/day)

0.59**

0.25

0.24

0.42**

Manganese (mg/day)

0.73**

0.59**

0.31*

0.36*

Vitamin A (μgRE/day)

0.59**

0.27

0.31*

0.34*

Vitamin D (μg/day)

0.43**

0.33*

0.15

0.20

Alpha tocopherol (mg/day)^‡

0.55**

0.40**

0.13

0.43**

Vitamin K (μg/day)^‡

0.43**

0.41**

0.23

0.58**

Vitamins B1 (mg/day)^‡

0.57**

0.31*

0.11

0.38*

Vitamins B2 (mg/day)^‡

0.70**

0.48**

0.38*

0.40*

Niacin (mg/day)^‡

0.61**

0.14

0.42**

0.46**

Vitamin B6 (mg/day)^‡

0.70**

0.42**

0.40*

0.56**

Vitamin B12 (μg/day)^‡

0.43**

0.16

0.40*

0.31

Folic acid (μg/day)^‡

0.55**

0.47**

0.28

0.64**

Pantothenic acid (mg/day)^‡

0.69**

0.43**

0.38*

0.37*

Vitamins C (mg/day)^‡

0.33*

0.03

0.31*

0.77**

Cholesterol (mg/day)^‡

0.47**

0.32*

0.34*

0.30

Dietary fiber (g/day)^‡

0.56**

0.51**

0.22

0.47**

Saturated fatty acid (g/day)^‡

0.60**

0.44**

0.16

0.47**

Monounsaturated fatty acid (g/day)^‡

0.50**

0.41**

0.11

0.15

Polyunsaturated fatty acid (g/day)^‡

0.46**

0.57**

0.07

0.26

n-3 polyunsaturated fatty acid (mg/day)^‡

0.54**

0.56**

0.16

0.36*

n-6 polyunsaturated fatty acid (mg/day)^‡

0.43**

0.56**

0.05

0.23

Myristic acid (mg/day)^‡

0.68**

0.27

0.34*

0.44**

Oleic acid (mg/day)^‡

0.48**

0.43**

0.06

0.15

Linoleic acid (mg/day)^‡

0.43**

0.56**

0.04

0.23

Alpha-linolenic acid (mg/day)^‡

0.37*

0.47**

-0.06

0.17

Arachidonic acid (mg/day)^‡

0.50**

0.34*

0.42**

0.39*

Icosapentaenoic acid (mg/day)^‡

0.48**

0.35*

0.30

0.34*

Docosahexaenoic acid (mg/day)^‡

0.52**

0.37*

0.30

0.31

a: Unadjusted Pearson correlation coefficient

b: Nutrient intakes were adjusted for age, sex and energy

‡: The data (Alpha tocopherol, Vitamin K, Vitamin B1, Vitamin B2, Niacin, Vitamin B6, and Vitamin 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

WDR: Weighed dietary record

SD: Standard deviation

*p < 0.05, **: p < 0.01

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