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Table 3 Correlation coefficients of nutrients between the WDRs and the CFFQ for young children and adolescents

From: Reproducibility and validity of the food frequency questionnaire for estimating habitual dietary intake in children and adolescents

Nutrients Young children (n = 48) Adolescents (n = 41)
  crude valuea adjusted valueb crude valuea adjusted valueb
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
  1. a: Unadjusted Pearson correlation coefficient
  2. b: Nutrient intakes were adjusted for age, sex and energy
  3. ‡: The data (Alpha tocopherol, Vitamin K, Vitamin B1, Vitamin B2, Niacin, Vitamin B6, and Vitamin B12) were transformed by natural log to improve normality
  4. CFFQ: Food frequency questionnaire for dietary assessment in children
  5. AFFQ: Food frequency questionnaire for dietary assessment in adults
  6. WDR: Weighed dietary record
  7. SD: Standard deviation
  8. *p < 0.05, **: p < 0.01