FFQ 1 | Test-retest reproducibility (FFQ 2) | P | Relative validity (WFR) | P | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Median | (P25, P75) | Median | (P25, P75) | Spearman’s r | Median | (P25, P75) | Spearman’s r | |||
Energy (kcal/day) | 2310 | (1478, 2745) | 1921 | (1619, 2796) | 0.82 | < 0.001 | 2170 | (1834, 3042) | 0.51 | 0.018 |
Energy (kJ/day) | 9696 | (6194, 11,519) | 8086 | (6795, 11,722) | 0.82 | < 0.001 | 9079 | (7672, 12,801) | 0.51 | 0.018 |
Fat (g/day) | 82a | (24) | 71 | (59, 109) | 0.71 | < 0.001 | 93a | (26) | 0.37b | 0.104 |
Saturated fat (g/day) | 25 | (22, 35) | 25 | (20, 37) | 0.77 | < 0.001 | 34 | (26, 40) | < 0.05 | 0.832 |
Carbohydrates (g/day) | 261 | (154, 300) | 231 | (177, 302) | 0.86 | < 0.001 | 250 | (175, 386) | 0.59 | 0.005 |
Fibre (g/day) | 30 | (17, 38) | 29 | (19, 38) | 0.85 | < 0.001 | 33a | (13) | 0.70 | < 0.001 |
Protein (g/day) | 92 | (66, 127) | 96 | (69, 119) | 0.87 | < 0.001 | 98 | (71, 110) | 0.50 | 0.021 |
Alcohol (g/day) | 2.8 | (0.3, 7.5) | 3.8 | (1.1, 5.1) | 0.83 | < 0.001 | 0 | (0, 6.6) | 0.71 | < 0.001 |
Vitamin A (RAE/day) | 779 | (349, 979) | 683 | (506, 975) | 0.87 | < 0.001 | 813 | (569, 1356) | 0.72 | < 0.001 |
Folate (μg/day) | 312a | (135) | 298 | (199, 416) | 0.90 | < 0.001 | 317 | (254, 436) | 0.78 | < 0.001 |
Vitamin B12 (μg/day) | 6.1 | (3.7, 8.4) | 6.8a | (2.8) | 0.86 | < 0.001 | 5.2 | (4.3, 6.6) | 0.66 | 0.001 |
Calcium (mg/day) | 811 | (623, 1197) | 828 | (497, 1373) | 0.93 | < 0.001 | 1122 | (774, 1280) | 0.55 | 0.010 |
Iron (mg/day) | 12a | (4.4) | 11a | (4.1) | 0.85b | < 0.001 | 12 | (9.8, 17) | 0.67 | 0.001 |
Iodine (μg/day) | 126 | (94, 228) | 142 | (95, 221) | 0.88 | < 0.001 | 131 | (97, 161) | 0.67 | 0.001 |
Vitamin D (μg/day) | 5.6 | (3.3, 7.4) | 5.5 | (3.3, 7.7) | 0.56 | 0.008 | 3.9 | (2.8, 5.6) | 0.46 | 0.034 |
Salt (g/day) | 7.7 | (5.2, 8.9) | 6.1 | (5.2, 10) | 0.85 | < 0.001 | 6.6 | (5.6, 9.0) | 0.21 | 0.363 |
Sugars (g/day) | 20 | (16, 27) | 27 | (15, 38) | 0.59 | 0.005 | 31 | (19, 67) | 0.62 | 0.003 |