Table 4. Intra-class correlation coefficients between two BDHQ3y implemented with an interval of one month for crude and energy-adjusted nutrient intakes and energy intake among 61 Japanese preschool children aged 3–4 years.
Nutrients | Unit | BDHQ3y_1a | BDHQ3y_2a | ICC | ||||
mean | SD | mean | SD | Crude | Adjusted 1(R)b | Adjusted 2(D)b | ||
Energy | kcal/day | 1018.75 | 233.14 | 984.66 | 219.12 | 0.73 | — | — |
Protein | g/day | 33.36 | 8.05 | 32.15 | 6.90 | 0.72 | 0.62 | 0.61 |
Fat | g/day | 33.56 | 8.57 | 32.18 | 7.64 | 0.70 | 0.70 | 0.71 |
Saturated fat | g/day | 11.51 | 3.27 | 11.23 | 3.42 | 0.61 | 0.62 | 0.64 |
Monounsaturated fat | g/day | 11.19 | 3.02 | 10.68 | 2.64 | 0.72 | 0.72 | 0.72 |
Polyunsaturated fat | g/day | 7.03 | 2.06 | 6.65 | 1.73 | 0.76 | 0.60 | 0.60 |
n-6 polyunsaturated fat | g/day | 6.05 | 1.82 | 5.72 | 1.51 | 0.77 | 0.59 | 0.59 |
n-3 polyunsaturated fat | g/day | 1.15 | 0.41 | 1.09 | 0.32 | 0.70 | 0.55 | 0.52 |
Marine-origin n-3c | g/day | 0.29 | 0.18 | 0.27 | 0.14 | 0.60 | 0.56 | 0.52 |
Eicosapentaenoic acid | g/day | 0.09 | 0.06 | 0.09 | 0.05 | 0.58 | 0.54 | 0.50 |
Docosahexaenoic acid | g/day | 0.17 | 0.10 | 0.15 | 0.08 | 0.61 | 0.57 | 0.56 |
α-linolenic acid | g/day | 0.83 | 0.28 | 0.80 | 0.22 | 0.72 | 0.54 | 0.53 |
Cholesterol | mg/day | 152.42 | 54.09 | 143.65 | 49.06 | 0.80 | 0.80 | 0.79 |
Carbohydrate | g/day | 143.27 | 35.85 | 138.99 | 35.06 | 0.73 | 0.68 | 0.69 |
Total dietary fiber | g/day | 5.58 | 2.05 | 5.24 | 1.88 | 0.81 | 0.75 | 0.77 |
Soluble dietary fiber | g/day | 1.38 | 0.55 | 1.28 | 0.49 | 0.78 | 0.74 | 0.75 |
Insoluble dietary fiber | g/day | 4.14 | 1.49 | 3.90 | 1.37 | 0.81 | 0.74 | 0.77 |
Retinol | µg/day | 163.35 | 57.25 | 155.91 | 56.82 | 0.52 | 0.48 | 0.49 |
Vitamin A (retinol equivalent)d | µg/day | 256.48 | 93.20 | 246.37 | 92.67 | 0.58 | 0.54 | 0.54 |
α-carotene | µg/day | 165.16 | 110.34 | 164.26 | 118.01 | 0.63 | 0.64 | 0.63 |
β-carotene | µg/day | 920.16 | 588.75 | 888.68 | 640.95 | 0.66 | 0.65 | 0.64 |
β-carotene equivalente | µg/day | 1111.25 | 657.46 | 1080.84 | 720.39 | 0.67 | 0.66 | 0.66 |
Cryptoxanthin | µg/day | 184.56 | 180.05 | 187.22 | 177.62 | 0.60 | 0.56 | 0.56 |
Vitamin D | µg/day | 4.04 | 2.36 | 3.72 | 1.65 | 0.61 | 0.52 | 0.50 |
α-tocopherol | mg/day | 3.43 | 0.99 | 3.23 | 0.88 | 0.76 | 0.69 | 0.70 |
Vitamin K | µg/day | 98.27 | 57.37 | 91.70 | 47.62 | 0.71 | 0.66 | 0.67 |
Thiamin | mg/day | 0.39 | 0.09 | 0.38 | 0.08 | 0.72 | 0.63 | 0.57 |
Riboflavin | mg/day | 0.71 | 0.18 | 0.70 | 0.20 | 0.56 | 0.49 | 0.56 |
Niacin | mg/day | 5.62 | 2.00 | 5.27 | 1.56 | 0.73 | 0.61 | 0.59 |
Vitamin B6 | mg/day | 0.52 | 0.16 | 0.49 | 0.13 | 0.76 | 0.71 | 0.69 |
Vitamin B12 | µg/day | 3.01 | 1.51 | 2.87 | 1.10 | 0.70 | 0.66 | 0.64 |
Folate | µg/day | 121.37 | 40.69 | 115.03 | 38.73 | 0.73 | 0.64 | 0.64 |
Pantothenic acid | mg/day | 3.41 | 0.83 | 3.33 | 0.80 | 0.64 | 0.57 | 0.58 |
Vitamin C | mg/day | 45.52 | 21.67 | 43.95 | 21.56 | 0.70 | 0.64 | 0.63 |
Sodium | mg/day | 2389.75 | 606.73 | 2273.21 | 542.56 | 0.76 | 0.56 | 0.55 |
Potassium | mg/day | 1219.06 | 334.21 | 1184.11 | 326.53 | 0.72 | 0.62 | 0.62 |
Calcium | mg/day | 399.87 | 121.14 | 398.47 | 141.85 | 0.62 | 0.62 | 0.63 |
Magnesium | mg/day | 125.67 | 33.41 | 120.49 | 30.73 | 0.77 | 0.58 | 0.58 |
Phosphorus | mg/day | 575.35 | 132.06 | 559.61 | 130.95 | 0.68 | 0.61 | 0.62 |
Iron | mg/day | 3.37 | 1.08 | 3.19 | 0.91 | 0.82 | 0.70 | 0.71 |
Zinc | mg/day | 4.19 | 0.94 | 4.08 | 0.86 | 0.74 | 0.63 | 0.62 |
Copper | mg/day | 0.60 | 0.18 | 0.58 | 0.16 | 0.82 | 0.67 | 0.69 |
Manganese | mg/day | 1.49 | 0.47 | 1.43 | 0.44 | 0.77 | 0.72 | 0.72 |
BDHQ3y, brief-type self-administered diet history questionnaire for preschool children; ICC, intra-class correlation coefficient (Case 1); SD, standard deviation.
Log-transformed energy and nutrient intake values were used for the calculation of intraclass correlation coefficient.
aThe column for BDHQ3y_1 shows the crude energy and nutrient intake values estimated by the BDHQ3y implemented at the beginning of the study period. That for BDHQ3y_2 shows those estimated by the BDHQ3y implemented at the end of the study period.
bAdjusted 1(R) shows the energy-adjusted nutrient intake values by the residual method. Adjusted 2(D) shows those adjusted by the density method.
cSum of eicosapentaenoic acid, docosapentaenoic acid, and docosahexaenoic acid.
dSum of retinol, β-carotene/12, α-carotene/24, and cryptoxanthin/24.
eSum of β-carotene, α-carotene/2, and cryptoxanthin/2.