Table 3.
Percentage agreement, percentage expected agreement, and weighted kappa statistic derived from e-EPIDEMIOLOGY and the paper FFQ.
| Comparison | Agreement (%) | Expected agreement (%) | Weighted kappa | P value |
| Fruit | 89.1 | 63.2 | 0.70 | <.001 |
| Vegetables | 87.0 | 59.8 | 0.68 | <.001 |
| Legumes | 91.2 | 81.7 | 0.52 | <.001 |
| Chicken/turkey | 89.1 | 66.3 | 0.68 | <.001 |
| Fish | 88.2 | 73.9 | 0.55 | <.001 |
| Red meat | 89.5 | 72.7 | 0.61 | <.001 |
| Soft drinks | 89.1 | 64.8 | 0.69 | <.001 |
| Sweets | 88.2 | 60.9 | 0.70 | <.001 |
| Prepared foods | 92.4 | 83.8 | 0.53 | <.001 |
| Alcoholic beverages | 89.9 | 67.1 | 0.69 | <.001 |
| Average | - | - | 0.64 | - |