Table 4.
Mean values of daily intakes of nutrients from two FFQa and Spearman correlation coefficients between values derived from the two FFQsa.
| FFQ1 | FFQ2 | Difference (%)c | Unadjustedd | Energy-adjustedd | |
| Energy (kcal) | 2283 ± 584 | 2128 ± 480 | -6.8 | 0.73*** | |
| Protein (g)b | 89.4 ± 28.4 | 86.8 ± 24.4 | -2.9 | 0.65*** | 0.83*** |
| CHO (g) | 286.3 ± 88.2 | 262.2 ± 80.6 | -8.4 | 0.79*** | 0.66*** |
| Lipids (g)b | 84.6 ± 25.1 | 78.9 ± 19.8 | -6.7 | 0.47* | 0.82*** |
| SFA (g)b | 28.8 ± 10.1 | 27.1 ± 8.6 | -5.9 | 0.51* | 0.81*** |
| MUFA (g)b | 34.9 ± 11.0 | 32.6 ± 8.4 | -6.6 | 0.52* | 0.82*** |
| PUFA (g)b | 14.3 ± 6.2 | 13.1 ± 4.7 | -8.4 | 0.60** | 0.74*** |
| EPA (g)b | 0.06 ± 0.05 | 0.07 ± 0.06 | 16.7 | 0.55** | 0.55** |
| DHA (g)b | 0.12 ± 0.09 | 0.15 ± 0.12 | 25.0 | 0.55** | 0.56** |
| Trans fat (g) | 3.5 ± 1.7 | 3.2 ± 1.4 | -8.6 | 0.60** | 0.79*** |
| Cholesterol (mg) | 278.2 ± 102.8 | 269.3 ± 75.1 | -3.2 | 0.47* | 0.73*** |
| Dietary fiber (g) | 22.9 ± 7.9 | 20.8 ± 6.3 | -9.2 | 0.76*** | 0.75*** |
| Soluble fiber (g) | 7.8 ± 2.4 | 7.1 ± 2.0 | -9.0 | 0.82*** | 0.87*** |
| Insoluble fiber (g) | 15.0 ± 5.5 | 13.7 ± 4.4 | -8.7 | 0.73*** | 0.81*** |
| Alchool (g) | 9.6 ± 6.7 | 9.4 ± 8.0 | -2.1 | 0.76*** | 0.70*** |
| Vitamin C (mg) | 201.6 ± 103.5 | 165.2 ± 77.0 | -18.1 | 0.81*** | 0.62*** |
| Folate (mcg)b | 442.0 ± 147.4 | 394.5 ± 128.5 | -10.7 | 0.71*** | 0.69*** |
| Calcium (mg)b | 1153.5 ± 453.5 | 1085.1 ± 456.2 | -5.9 | 0.79*** | 0.86*** |
| Iron (mg)b | 15.8 ± 5.7 | 14.5 ± 4.7 | -8.2 | 0.64*** | 0.79*** |
Values are means ± SD
a 2 FFQ were administered 4 weeks apart
b Student t test analyses were performed on log transformed values
c (value derived from FFQ2 - value derived from FFQ1)/(value derived from FFQ1) × 100
d Correlations between FFQ1 and FFQ2 were statistically significant at * p ≤ 0.05; ** p ≤ 0.01; *** p ≤ 0.0001