Table 3.
Validation results of the glycaemic index FFQ (GI-FFQ) with the general-FFQ and 2-day 24 h-recalls.
| GI-FFQ with General-FFQ | GI-FFQ with 2-day 24 h-Recalls | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Similar Q or T | Crude | Energy-Adjusted | Similar Q or T | Crude | ICC | De-Attenuated | Energy-Adjusted | Energy Adjusted De-Attenuated | |
| % | r | r | % | r | r | r | r | ||
| Energy, kJ/day | 46 | 0.58 | - | 39 | 0.43 | 0.52 | 0.60 | - | |
| Carbohydrates, g/day | 48 | 0.64 | 0.34 | 40 | 0.53 | 0.63 | 0.67 | 0.27 | 0.34 |
| Mono/disaccharides, g/day | 45 | 0.60 | 0.45 | 41 | 0.48 | 0.63 | 0.60 | 0.41 | 0.52 |
| Polysaccharides, g/day | 48 | 0.61 | 0.31 | 44 | 0.57 | 0.58 | 0.75 | 0.35 | 0.46 |
| Fibres, g/day | 44 | 0.57 | 0.60 | 41 | 0.52 | 0.67 | 0.64 | 0.48 | 0.59 |
| Bread, g/day | 54 | 0.71 | 0.61 | 46 | 0.61 | 0.67 | 0.75 | 0.49 | 0.60 |
| Breakfast cereals, g/day | 62 | 0.41 | 0.46 | 62 | 0.43 | 0.70 | 0.51 | 0.42 | 0.50 |
| Potatoes, g/day | 43 | 0.55 | 0.49 | 33 | 0.27 | 0.29 | 0.50 | 0.25 | 0.46 |
| Pasta, g/day | 43 | 0.56 | 0.51 | - | 0.15 | 0.10 | 0.47 | 0.11 | 0.35 |
| Rice, g/day | 45 | 0.45 | 0.45 | - | 0.14 | 0.09 | 0.47 | 0.16 | 0.53 |
| Vegetables, g/day | 41 | 0.47 | 0.47 | 32 | 0.20 | 0.38 | 0.32 | 0.19 | 0.31 |
| Fruit, g/day | 52 | 0.67 | 0.67 | 40 | 0.48 | 0.65 | 0.60 | 0.49 | 0.61 |
| Dairy, g/day | 45 | 0.58 | 0.58 | 45 | 0.58 | 0.66 | 0.71 | 0.56 | 0.69 |
| Soup, g/day | 37 | 0.46 | 0.45 | 48 | 0.24 | 0.10 | 0.76 | 0.20 | 0.63 |
| Coffee, g/day | 49 | 0.79 | 0.76 | 55 | 0.76 | 0.82 | 0.84 | 0.75 | 0.83 |
| SSB, g/day | 58 | 0.50 | 0.41 | 51 | 0.32 | 0.48 | 0.46 | 0.31 | 0.45 |
| ASB, g/day | - | 0.44 | 0.51 | - | 0.28 | 0.66 | 0.34 | 0.33 | 0.41 |
| Fruit juices, g/day | 51 | 0.59 | 0.56 | 46 | 0.40 | 0.51 | 0.56 | 0.33 | 0.46 |
| Alcoholic beverages, g/day | 53 | 0.67 | 0.65 | 42 | 0.47 | 0.64 | 0.59 | 0.41 | 0.51 |
| Savoury snacks, g/day | 39 | 0.44 | 0.37 | 40 | 0.22 | 0.12 | 0.64 | 0.16 | 0.46 |
| Cake/cookies, g/day | 47 | 0.62 | 0.55 | 36 | 0.42 | 0.30 | 0.77 | 0.41 | 0.75 |
| Sweets, g/day | 42 | 0.45 | 0.44 | 37 | 0.37 | 0.48 | 0.53 | 0.44 | 0.64 |
| GI | 43 | 0.58 | 0.53 | 35 | 0.40 | 0.39 | 0.64 | 0.38 | 0.61 |
| GL | 48 | 0.65 | 0.30 | 44 | 0.57 | 0.59 | 0.74 | 0.27 | 0.35 |
ICC: Intra class Correlation Coefficient; SSB: sugar sweetened beverages; ASB: artificially sweetened beverages. ASB intake data as obtained by the GI-FFQ did not allow cross-classification analyses. Pasta and rice intake data as obtained by the 2-day 24 h-recalls did now allow cross-classification analyses. Limited variation in intake data of breakfast cereals as obtained by the GI-FFQ resulted in analyses per tertiles instead of quartiles. Limited variation in intake data of SSBs as obtained by the general-FFQ and 2-day 24 h-recalls resulted in analyses in tertiles instead of quartiles. Limited variation in intake data of fruit juices, savoury snacks and soups as obtained by 2-day 24 h-recalls resulted in analyses in tertiles instead of quartiles.