Table 3.
Mean daily nutrient intakes and Pearson correlation coefficients in two FFQs in adolescents aged 15–17 years of the INMA-Granada study (n = 51).
| Nutrients Intake (Units/day) | FFQ1 1 | FFQ2 2 | p-Value 2 | Pearson Coefficient (FFQ1 vs. FFQ2) | % of Agreement 5 | |
|---|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | r 3 | r adj. 4 | |||
| Energy (kcals/day) | 3042 (1875) | 2777 (1395) | 0.412 | 0.43 | 62.3 | |
| Protein (g/day) | 139 (90) | 126 (74) | 0.427 | 0.51 | 0.20 | 66.0 |
| Total carbohydrates (g/day) | 336 (183) | 308 (145) | 0.395 | 0.38 | 0.28 | 67.9 |
| Dietary fiber (g/day) | 29 (18) | 26 (14) | 0.396 | 0.35 | 0.26 | 62.3 |
| Total fat (g/day) | 131 (95) | 119 (70) | 0.462 | 0.48 | 0.24 | 66.0 |
| SFA (g/day) | 44 (36) | 37 (23) | 0.217 | 0.46 | 0.43 | 67.9 |
| MUFA (g/day) | 52 (36) | 50 (30) | 0.775 | 0.48 | 0.21 | 67.9 |
| PUFA (g/day) | 24 (18) | 22 (14) | 0.550 | 0.45 | 0.39 | 67.9 |
| Omega 3 (g/day) | 2.7 (2.3) | 2.4 (1.8) | 0.387 | 0.36 | 0.39 | 67.9 |
| Omega 6 (g/day) | 19.5 (15.6) | 17.2 (12.5) | 0.402 | 0.40 | 0.43 | 64.2 |
| Trans fatty acid (g/day) | 0.9 (0.9) | 0.7 (0.6) | 0.189 | 0.64 | 0.63 | 75.5 |
| Retinol (µg/day) | 1115 (1395) | 644 (565) | 0.026 | 0.39 | 0.28 | 75.5 |
| α-Carotene (µg/day) | 1112 (1392) | 1053 (997) | 0.804 | 0.58 | 0.65 | 73.6 |
| β-Carotene (µg/day) | 4681 (4115) | 4220 (3160) | 0.520 | 0.58 | 0.65 | 79.2 |
| β-Cryptoxanthin (µg/day) | 372 (273) | 389 (265) | 0.748 | 0.32 | 0.38 | 60.4 |
| Lutein-Zeaxanthin (µg/day) | 3434 (3649) | 2674 (2131) | 0.194 | 0.37 | 0.33 | 58.8 |
| Lycopene (µg/day) | 4761 (3543) | 4946 (3190) | 0.779 | 0.35 | 0.16 | 64.2 |
| Folate (µg/day) | 426 (269) | 397 (198) | 0.529 | 0.45 | 0.31 | 64.2 |
| Vitamin C (mg/day) | 179 (141) | 200 (125) | 0.415 | 0.50 | 0.55 | 73.6 |
| Calcium (mg/day) | 1600 (1023) | 1357 (629) | 0.144 | 0.44 | 0.45 | 75.5 |
| Magnesium (mg/day) | 447 (265) | 398 (201) | 0.284 | 0.39 | 0.27 | 66.0 |
| Potassium (mg/day) | 4506 (2542) | 4037 (1921) | 0.287 | 0.35 | 0.35 | 69.8 |
| Sodium (mg/day) | 4957 (3576) | 4367 (2171) | 0.308 | 0.31 | 0.27 | 58.5 |
| Zinc (mg/day) | 16 (10) | 15 (8) | 0.346 | 0.37 | 0.11 | 64.2 |
| Iodine (µg/day) | 135 (80) | 111 (53) | 0.077 | 0.30 | 0.40 | 66.0 |
| Average of correlation coefficients | 0.43 | 0.36 | 67.4 | |||
1 FFQ1 & FFQ2, the same FFQ was firstly administered at baseline (FFQ1) and secondly (FFQ2), between 9 to 12 months later; 2 p-value from paired t-tests; 3 r: coefficient correlations after nutrient crude intakes were log-transformed; 4 r adj: correlation coefficient using nutrient intakes adjusted for total energy; 5 Percentage of children classified in the same or an adjacent quintile in nutrient crude intakes; FFQ, food frequency questionnaire; SFA, saturated fatty acids; MUFA, monounsaturated fatty acids; PUFA, polyunsaturated fatty acids.