Table 4.
Mean agreement and limits of agreement between nutrient intakes estimated by the web-FFQ and the print-FFQ.
| Nutrient Groups | Mean Agreement (95% CI) | Lower LOA | Upper LOA | Slope (β) |
|---|---|---|---|---|
| Total energy intake, kcal | −0.068 (−0.126, −0.010) | −0.835 | 0.699 | 0.135 |
| SFA, mg | −0.072 (−0.137, −0.006) | −0.934 | 0.790 | 0.179 * |
| MUFA, mg | −0.239 (−0.354, −0.123) | −1.756 | 1.279 | −0.427 *** |
| PUFA, mg | −0.092 (−0.160, −0.024) | −0.990 | 0.806 | −0.020 |
| Folate, µg | 0.007 (−0.076, 0.090) | −1.077 | 1.091 | 0.058 |
| Iron, mg | −0.059 (−0.120, 0.003) | −0.861 | 0.744 | 0.053 |
| Calcium, mg | −0.060 (−0.066, −0,055) | −1.088 | 0.968 | 0.076 |
| Magnesium, mg | −0.025 (−0.087, 0.036) | −0.835 | 0.784 | 0.080 |
| Zinc, mg | −0.037 (−0.095, 0.020) | −0.800 | 0.725 | 0.145 |
| Vitamin A, µg | −0.036 (−0.026, 0.051) | −1.172 | 1.101 | 0.034 |
| Vitamin B1, mg | −0.027 (−0.067, 0.012) | −0.547 | 0.492 | 0.008 |
| Vitamin B6, mg | −0.024 (−0.070, 0.023) | −0.636 | 0.589 | 0.056 |
| Vitamin C, mg | 0.179 (0.043, 0.316) | −1.613 | 1.972 | 0.029 |
| Vitamin D, µg | −0.050 (−0.151, 0.052) | −1.383 | 1.283 | 0.163 |
Abbreviations: 95% CI, 95% confidence interval; LOA, limits of agreement. *** p < 0.001; * p < 0.05.