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Agreement of quartile assignment between the short FFQ and n-3 concentration in erythrocytes.
| Quartile | Same quartile | Adjacent quartile | Misclassified |
|---|---|---|---|
| 1 (n = 12) | 5 | 5 (above) | 2 (above) |
| 2 (n = 17) | 8 | 9 (4 above, 5 below) | 0 |
| 3 (n = 12) | 7 | 5 (below) | 0 |
| 4 (n = 12) | 8 | 4 (below) | 0 |
| Total number (n = 53) | 28 | 23 | 2 |
| % | 53 | 43 | 4 |
