Table 3.
Cross-classification of participants by tertiles of calculated daily food group and nutrient intakes from the FFQ and the 3 d food record (FR) among pre-school children (fifty-one boys and forty-eight girls) in the validation study of the mother–child ‘Rhea’ birth cohort, Heraklion, Crete, Greece, 2011–2012
| Agreement of tertiles for food groups and nutrients | |||||
|---|---|---|---|---|---|
| Correctly classified (%) | Adjacent classified (%) | Grossly misclassified (%) | Weighted kappa (κ w)† | 95 % CI | |
| Food groups | |||||
| Sugar preserves and confectionery (g) | 49·0 | 39·8 | 11·2 | 0·37* | 0·23, 0·44 |
| Vegetables (g) | 43·4 | 39·5 | 17·1 | 0·21* | 0·05, 0·31 |
| Fruits (g) | 58·5 | 36·1 | 5·4 | 0·57* | 0·53, 0·63 |
| Pulses (g) | 47·0 | 41·2 | 11·8 | 0·31* | 0·20, 0·45 |
| Milk (g) | 58·5 | 38·5 | 3·0 | 0·62* | 0·47, 0·73 |
| Poultry (g) | 36·5 | 47·3 | 16·2 | 0·12 | 0·00, 0·20 |
| Red meat (g) | 44·7 | 39·7 | 15·6 | 0·17* | 0·06, 0·32 |
| Eggs (g) | 45·5 | 44·3 | 10·2 | 0·36* | 0·16, 0·42 |
| Nutrients | |||||
| Protein (g) | 38·4 | 48·4 | 13·2 | 0·24* | 0·15, 0·32 |
| Carbohydrate (g) | 39·4 | 46·4 | 14·2 | 0·23* | 0·10, 0·42 |
| Total fat (g) | 38·4 | 46·4 | 15·2 | 0·20* | 0·01, 0·34 |
| MUFA (per 100 g) | 41·4 | 40·4 | 18·2 | 0·15 | 0·01, 0·32 |
| PUFA (per 100 g) | 47·5 | 42·4 | 10·1 | 0·38* | 0·28, 0·53 |
| SFA (per 100 g) | 43·4 | 36·4 | 20·2 | 0·12 | 0·01, 0·28 |
| Vitamin B12 (μg) | 52·5 | 38·4 | 9·1 | 0·44* | 0·39, 0·52 |
| Vitamin C (mg) | 39·4 | 50·5 | 10·1 | 0·32* | 0·20, 0·40 |
| Folate (μg) | 43·4 | 44·4 | 12·2 | 0·30* | 0·21, 0·40 |
| Zn (mg) | 43·4 | 42·4 | 14·2 | 0·26* | 0·03, 0·44 |
| Ca (mg) | 49·5 | 38·4 | 12·1 | 0·35* | 0·19, 0·39 |
| Fe (mg) | 37·3 | 46·5 | 16·2 | 0·17* | 0·03, 0·24 |
| Iodine (μg) | 58·6 | 32·3 | 9·1 | 0·48* | 0·32, 0·59 |
| P (mg) | 53·6 | 32·2 | 14·2 | 0·33* | 0·17, 0·53 |
Correctly classified if classified into the same tertile and grossly misclassified if classified into opposing tertiles.
*
Statistically significant κ w (P<0·05).
†
κ w analysis of the agreement between the FFQ and the FR was undertaken on energy-adjusted data, using Fleiss–Cohen quadratic weight.