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Testing for agreement between the FFQ and the mean of 2-day dietary recall method-cross-classification analyses and kappa statistics
| Nutrient | Exact/adjacent quintile (%) | Gross misclassification (%) | Κw | 95% CI |
|---|---|---|---|---|
| Energy | 76 (90) | 0 (0) | 0.26 | 0.06 0.44 |
| Protein | 56 (67) | 2 (2) | 0.10 | 0.01 0.33 |
| Calcium | 58 (69) | 5 (6) | 0.14 | −0.03 0.30 |
| Phosphorus | 56 (67) | 0 (0) | 0.17 | −0.01 0.35 |
| Potassium | 56 (67) | 4 (5) | 0.17 | 0.08 0.26 |
