Table 4.
The number and share of individuals misclassified and classified into the same tertile, as well as individuals of the same or conflicting iron intake adequacy category.
| FFQ1 vs. 3-Day Dietary Record | FFQ1 vs. FFQ2 | |||
|---|---|---|---|---|
| Individuals classified into the same tertile | n | 40 | 59 | |
| % | 53.3 | 78.7 | ||
| Individuals classified into adjacent tertiles | n | 26 | 14 | |
| % | 34.7 | 18.7 | ||
| Individuals misclassified (classified into opposite tertiles) | n | 9 | 2 | |
| % | 12.0 | 2.7 | ||
| Weighted κ statistic | 0.36 | 0.73 | ||
| Individuals of the | same iron intake adequacy category | n | 49 | 67 |
| % | 65.3 | 89.3 | ||
| conflicting iron intake adequacy category | n | 26 | 8 | |
| % | 34.7 | 10.7 | ||
FFQ1—IRONIC-FFQ food frequency questionnaire filled out directly after conducting the three-day dietary record; FFQ2—IRONIC-FFQ food frequency questionnaire filled out 6 weeks after the FFQ1.