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Table 4 Correlation coefficients of nutrients between the WDRs and the AFFQ 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) 0.57**   0.31  
Protein (g/day) 0.55** 0.15 0.25 0.32*
Total fat (g/day) 0.41** 0.23 -0.07 -0.01
Carbohydrate (g/day) 0.57** 0.17 0.45** -0.01
Sodium (mg/day) 0.39** 0.41** 0.30 0.41**
Potassium (mg/day) 0.54** 0.53** 0.25 0.34*
Calcium (mg/day) 0.50** 0.33* 0.37* 0.50**
Magnesium (mg/day) 0.50** 0.68** 0.16 0.17
Phosphorous (mg/day) 0.54** 0.28 0.28 0.25
Iron (mg/day) 0.41** 0.27 0.25 0.44**
Zinc (mg/day) 0.49** 0.22 0.36* 0.05
Copper (mg/day) 0.51** 0.47** 0.40* 0.45**
Manganese (mg/day) 0.71** 0.61** 0.26 0.15
Vitamin A (μgRE/day) 0.25 0.42** 0.21 0.30
Vitamin D (μg/day) 0.23 0.24 0.17 0.26
Alpha tocopherol (mg/day) 0.11 0.21 0.01 0.28
Vitamin K (μg/day) 0.16 0.35* 0.28 0.43**
Vitamins B1 (mg/day) 0.48** 0.37* 0.02 0.22
Vitamins B2 (mg/day) 0.24 0.29 0.33* 0.37*
Niacin (mg/day) 0.22 0.34* 0.34* 0.38*
Vitamin B6 (mg/day) 0.33* 0.50** 0.24 0.38*
Vitamin B12 (μg/day) 0.21 0.32* 0.31 0.25
Folic acid (μg/day) 0.18 0.46** 0.16 0.43**
Pantothenic acid (mg/day) 0.26 0.33* 0.29 0.23
Vitamins C (mg/day) 0.25 0.28 0.24 0.51**
Cholesterol (mg/day) 0.09 0.29* 0.20 0.09
Dietary fiber (g/day) 0.51** 0.61** 0.21 0.42**
Saturated fatty acid (g/day) 0.54** 0.31* 0.02 0.32*
Monounsaturated fatty acid (g/day) 0.35* 0.19 -0.13 0.02
Polyunsaturated fatty acid (g/day) 0.13 0.16 -0.09 0.23
n-3 polyunsaturated fatty acid (mg/day) 0.33* 0.33* 0.09 0.35*
n-6 polyunsaturated fatty acid (mg/day) 0.18 0.15 -0.09 0.19
Myristic acid (mg/day) 0.64** 0.18 0.35* 0.63**
Oleic acid (mg/day) 0.37* 0.19 -0.13 0.01
Linoleic acid (mg/day) 0.17 0.16 -0.09 0.20
Alpha-linolenic acid (mg/day) 0.11 0.01 -0.06 0.24
Arachidonic acid (mg/day) 0.45** 0.22 0.17 0.03
Icosapentaenoic acid (mg/day) 0.44** 0.39** 0.27 0.34*
Docosahexaenoic acid (mg/day) 0.38** 0.35* 0.29 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