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Table 4 Variance ratios among combinations of self-reported nutrients intakes assessed using repeated recalls with the R24W.

From: Assessing the relative validity of a web-based self-administered 24-hour dietary recall in a Canadian adolescent’s population

 

Variance ratio † (N=111)†(N=11)

Variance ratio † (N=61)

 

2 recalls vs. 1

3 recalls vs. 1

Energy (kcal)

0.57

0.50

Carbohydrates (g)

0.68

0.56

Fat (g)

0.43

0.35

Proteins (g)

0.64

0.61

% E Carbohydrates

0.61

0.57

% E Fat

0.53

0.42

% E Proteins

0.71

0.60

Fibres (g)

0.48

0.52

Vitamin A (mcg)

0.46

0.41

Thiamin (mg)

0.68

0.55

Riboflavin (mg)

1.33

0.87

Niacin (mg NE)

0.69

0.58

Vitamin B6 (mg)

0.86

0.72

Folate (mcg DFE)

0.67

0.49

Vitamin B12 (mcg)

0.53

0.43

Vitamin C (mg)

0.56

0.55

Vitamin D (mcg)

0.57

0.49

Mg (mg)

0.60

0.50

P (mg)

0.58

0.49

Zn (mg)

0.57

0.54

Fe (mg)

0.68

0.71

Ca (mg)

0.67

0.56

K (mg)

0.61

0.60

SFA (g)

0.57

0.51

Na (mg)

0.59

0.45

Total sugars (g)

0.86

0.69

Mean

0.64

0.55

SD

0.17

0.11

  1. DFE, dietary folate equivalent; NE, niacin equivalent † A ratio < 1.00 indicates a lower variance (i.e., greater precision around the mean) and a ratio > 1.00 indicates greater variance (i.e., lower precision around the mean) compared with the reference categories (i.e., one recall)
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Nutrition Journal

ISSN: 1475-2891

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