Table 7.
Comparisons of the second FFQ scores with mean daily intakes derived from the diet records, based on cross classification by quartiles in high school children (%)
| Nutrient | Same quartile | Within 1 quartile | Within 2 quartiles | Gross-misclassification |
|---|---|---|---|---|
| Energy (kcal) | 27.1 | 43.8 | 15.6 | 6.3 |
| Protein (g) | 19.8 | 42.7 | 18.8 | 10.4 |
| Fat (g) | 28.1 | 34.4 | 18.8 | 10.4 |
| CHO (g) | 26.0 | 31.3 | 24.0 | 10.4 |
| Ca (mg) | 35.4 | 27.1 | 20.8 | 8.3 |
| Fe (mg) | 31.3 | 40.6 | 16.7 | 3.1 |
| Mg (mg) | 38.5 | 37.5 | 12.5 | 3.1 |
| Vit C (mg) | 42.7 | 28.1 | 17.7 | 3.1 |
| Vit B6 (mg) | 36.5 | 37.5 | 14.6 | 3.1 |
| Vit B12 (mcg) | 33.3 | 31.3 | 20.8 | 6.3 |
| Folate (mcg) | 33.3 | 42.7 | 12.5 | 3.1 |
| Vit D (mcg) | 35.4 | 35.4 | 17.7 | 3.1 |