Table 4. Misclassification and weighted kappa between FFQ1 and FFQ2.
| variables | FFQ1 vs. FFQ2 | Weighted kappa | ||
| Same (%) | Adjacent (%) | Extreme (%) | ||
| Food groups | ||||
| Cereal (g) | 44.9 | 34.8 | 1.9 | 0.38 |
| Pickled vegetable (g) | 34.8 | 36.7 | 11.1 | 0.16 |
| Egg (g) | 46.4 | 29.5 | 5.8 | 0.35 |
| Meat (g) | 45.9 | 41.1 | 2.4 | 0.44 |
| Fish and shellfish (g) | 41.1 | 43.5 | 3.4 | 0.38 |
| Milk (g) | 65.7 | 20.3 | 5.8 | 0.50 |
| Snack and nut (g) | 42.5 | 35.3 | 6.3 | 0.33 |
| Bean (g) | 43.0 | 41.1 | 3.9 | 0.39 |
| Vegetable (g) | 30.9 | 39.1 | 5.3 | 0.16 |
| Fruit (g) | 45.9 | 39.1 | 2.4 | 0.43 |
| Oil (g) | 43.0 | 37.7 | 6.8 | 0.32 |
| Nutrients | ||||
| Energy (Kcal) | 48.3 | 34.3 | 1.5 | 0.44 |
| Protein (g) | 44.9 | 41.1 | 2.4 | 0.43 |
| Fat (g) | 40.6 | 38.2 | 6.3 | 0.30 |
| Fiber (g) | 40.1 | 41.1 | 1.9 | 0.35 |
| Carbohydrate (g) | 41.6 | 42.0 | 3.4 | 0.37 |
| Vitamin A (µg) | 34.3 | 43.0 | 6.3 | 0.24 |
| Carotene (µg) | 36.2 | 37.7 | 9.7 | 0.20 |
| Thiamin (mg) | 49.3 | 32.9 | 1.0 | 0.44 |
| Riboflavin (mg) | 41.2 | 37.2 | 2.9 | 0.34 |
| Niacin (mg) | 42.5 | 40.6 | 2.9 | 0.38 |
| Vitamin E (mg) | 39.6 | 39.1 | 5.3 | 0.30 |
| Sodium (mg) | 36.7 | 36.2 | 10.1 | 0.20 |
| Calcium (mg) | 34.3 | 42.0 | 4.4 | 0.25 |
| Iron (mg) | 47.8 | 37.7 | 1.9 | 0.45 |
| Vitamin C (mg) | 34.8 | 39.6 | 5.8 | 0.23 |
| Cholesterol (mg) | 43.0 | 37.2 | 2.4 | 0.37 |