Table 2.
Misreporting and agreement of food groups from DQQ and 24hR in the Vietnamese and Nigerian study population
| Misreporting | Agreement statistics | ||||
|---|---|---|---|---|---|
| % FP | % FN | Sensitivity | Specificity | % agreement | |
| Vietnam | |||||
| Vitamin A-rich vegetables | 8·5 | 4·8 | 0·5 | 0·90 | 90·2 |
| Dark green leafy vegetables | 11 | 9·3 | 0·88 | 0·45 | 79·7 |
| Other vegetables | 6·5 | 26 | 0·67 | 0·68 | 67·5 |
| Vitamin A-rich fruits | 5·2 | 5·7 | 0·45 | 0·94 | 89·0 |
| Citrus | 11 | 9·8 | 0·68 | 0·84 | 79·3 |
| Other fruits | 8·1 | 26·6 | 0·52 | 0·82 | 65·2 |
| Nigeria | |||||
| Vitamin A-rich vegetables | 42·3 | 1·2 | 0·88 | 0·53 | 56·4 |
| Dark green leafy vegetables | 11·2 | 1·6 | 0·97 | 0·74 | 87·2 |
| Other vegetables | 2 | 6 | 0·94 | 0·58 | 93·0 |
| Vitamin A-rich fruits | 0·5 | 0·9 | 0·91 | 0·99 | 98·6 |
| Citrus | 1·4 | 0·6 | 0·98 | 0·98 | 98·0 |
| Other fruits | 1·3 | 1·8 | 0·99 | 0·99 | 96·9 |
DQQ, Diet Quality Questionnaire; 24hR, 24-h recall; FP, false positive, type I error; FN, false negative, type II error. Coefficient agreement formula: ((a + d)/n) × 100, where a is the number of observations not having consumed the food group in both DQQ and 24hR, d is the number of observations having consumed the food group in both DQQ and 24hR, and n is the total number of observations.