Table 3.
Validation of energy and nutrients intakes between FFQs and 24HRs (n = 139)
| Nutrient | FFQs | 24HRs | Pearson correlation coefficients | |||
|---|---|---|---|---|---|---|
| Median | P25, P75 | Median | P25, P75 | unadjusted † | Energy adjusted‡ | |
| Energy (Kcal) | 2273.5 | 2100.7, 2505.3 | 2195.2 | 2034.3, 2277.1 | 0.79** | |
| Protein (g) | 64.5 | 60.0, 69.5 | 63.1 | 59.3, 67.2 | 0.57** | 0.56** |
| Fat (g) | 72.2 | 67.1, 77.3 | 72.9 | 68.1, 76.4 | 0.71** | 0.68** |
| Carbohydrates (g) | 340.5 | 321.3, 365.4 | 346.5 | 325.3, 365.2 | 0.43** | 0.38** |
| Dietary fiber (g) | 14.2 | 11.3, 15.3 | 14.0 | 11.2, 16.3 | 0.26** | 0.26** |
| Cholesterol (mg) | 265.5 | 250.3, 297.5 | 278.2 | 257.0, 298.8 | 0.77** | 0.75** |
| Vitamin A (μg RE) | 544.2 | 456.5, 587.8 | 551.0 | 468.3, 577.5 | 0.61** | 0.58** |
| Vitamin D (μg) | 11.5 | 9.3, 13.6 | 11.4 | 9.2, 14.5 | 0.77** | 0.65** |
| Vitamin E (mg) | 13.4 | 11.5, 15.6 | 14.2 | 11.3, 16.7 | 0.32** | 0.28** |
| Vitamin K (μg) | 67.3 | 55.2, 77.3 | 68.2 | 64.9, 77.8 | 0.60** | 0.55** |
| Thiamin (mg) | 0.8 | 0.6, 1.1 | 1.1 | 0.7, 1.3 | 0.75** | 0.76** |
| Riboflavin (mg) | 0.9 | 0.7, 1.2 | 0.9 | 0.7, 1.2 | 0.75** | 0.77** |
| Vitamin B6 (mg) | 1.0 | 0.7, 1.2 | 1.2 | 0.8, 1.4 | 0.73** | 0.76** |
| Vitamin B12 (μg) | 1.3 | 0.7, 2.1 | 1.7 | 1.2, 2.2 | 0.66** | 0.63** |
| Vitamin C (mg) | 67.5 | 58.3, 87.2 | 95.4 | 84.9, 104.2 | 0.48** | 0.49** |
| Folate (μg) | 384.8 | 331.8, 442.8 | 386.5 | 334.8, 457.5 | 0.57** | 0.52** |
| Calcium (mg) | 598.5 | 491.3, 709.6 | 629.6 | 520.3, 705.3 | 0.64** | 0.63** |
| Phosphorus (mg) | 729.5 | 610.3, 867.8 | 717.8 | 639.5, 799.5 | 0.61** | 0.60** |
| Potassium (mg) | 1681.5 | 1567.3, 1983.8 | 1876.3 | 1786.5, 1995.5 | 0.63** | 0.61** |
| Sodium (mg) | 1564.2 | 1474.8, 1849.8 | 1763.5 | 1645.5, 1894.3 | 0.61* | 0.61* |
| Magnesium (mg) | 273.4 | 255.8, 296.1 | 309.5 | 286.3, 336.8 | 0.21* | 0.21* |
| Iron (mg) | 13.2 | 10.2, 14.7 | 12.5 | 9.0, 15.3 | 0.12 | 0.12 |
| Iodine (μg) | 86.8 | 66.3, 113.2 | 87.3 | 77.4, 97.8 | 0.49* | 0.47* |
| Zinc (mg) | 12.3 | 10.3, 14.4 | 11.5 | 10.3, 14.2 | 0.22* | 0.22* |
| Selenium (μg) | 59.3 | 54.7, 69.8 | 58.3 | 53.5, 68.4 | 0.62** | 0.61** |
| Copper (mg) | 0.8 | 0.6, 1.2 | 1.1 | 0.9, 1.3 | 0.15 | 0.14 |
| Niacinamide (mg) | 267.4 | 251.2, 280.5 | 281.5 | 263.3, 295.3 | 0.42** | 0.41** |
| Choline (mg) | 445.2 | 337.5, 493.5 | 432.6 | 366.3, 466.2 | 0.55** | 0.53** |
Daily intakes of nutrients estimated by FFQs and 24HRs; P25, P75, 25th–75th percentile
†Based on log-transformed values
‡Energy adjusted using the residual method
Statistical significance was accepted with *P < 0.05, **P < 0.01