Bias Precision  
Daily nutrient intake Difference 95% LOA Ratio (%) 95% LOA Difference 95% LOA Ratio (%) 95% LOA ICC
  Energy (Kcal ) - - 112 [52-244] - - 136 [82-227] 0.07
Water (g) 602.9 [-1255.4-2461.2] 125 [62-255] 743.6 [-890-2377.2] 133 [71-247] 0.29*
Protein (g) 6.2 [-54.5-67] 107 [50-233] 21.8 [-21.5-65.1] 134 [81-223] 0.08
Lipids Lipid (g) 6.4 [-63.2-75.9] 109 [47-249] 28.1 [-13.6-69.8] 143 [92-221] 0.22
SFA (g) - - 115 [45-289] - - 147 [83-260] 0.11
MUFA (g) - - 111 [46-266] - - 144 [87-239] 0.38*
PUFA (g) - - 90 [31-259] - - 153 [80-290] 0.44*
Linoleic acid (g) - - 91 [28-291] - - 155 [71-339] 0.27
Cholesterol (mg) 10.7 [-312.4-333.8] 107 [36-317] 113.6 [-113.1-340.3] 149 [72-308] 0.07
Carbohydrates Sugar (g) - - 142 [49-413] - - 165 [75-362] 0.23
Starch (g) - - 100 [40-253] - - 148 [91-238] 0.32*
Fiber (g) 5.5 [-14.3-25.2] 126 [49-326] 8.2 [-7.03-23.5] 148 [73-299] 0.24
Mean     111       146   0.24
Minerals Calcium (mg) 302.2 [-685.2-1289.5] 136 [60-306] 356.1 [-553.6-1265.9] 143 [70-293] 0.35*
Iron (mg) 3,0 [-8.8-14.9] 123 [51-295] 4.7 [-4.7-14.03] 141 [72-276] 0.19
Potassium (mg) - - 124 [56-275] - - 137 [73-260] 0.13
Magnesium (mg) - - 127 [63-256] - - 134 [73-246] 0.14
Sodium (mg) - - 112 [46-269] - - 143 [82-247] 0.16
Phosphorus (mg) 240.1 [-828.3-1308.4] 119 [56-251] 383.1 [-495.5-1261.8] 134 [75-238] 0.18
Zinc (mg) 0.6 [-9.5-10.8] 108 [49-235] 3.6 [-3.4-10.7] 132 [75-232] 0.36*
Copper (mg) 0.4 [-2.8-3.6] 118 [39-356] 1.2 [-1.1-3.4] 146 [62-345] 0.27
Vitamins Vitamin A (µg) 508.3 [-1471.6-2488.2] 149 [39-563] 869.02 [-495.4-2233.4] 188 [77-455] -0.13
Vitamin B12 (µg) 0.08 [-7.4-7.6] 108 [31-374] 2.4 [-3.2-8.1] 158 [68-367] 0.07
Vitamin E (mg) - - 152 [51-454] - - 170 [72-404] 0.15
Vitamin B1 (mg) - - 121 [55-265] - - 137 [76-247] 0.35*
Vitamin B2 (mg) 0.5 [-1.4-2.5] 128 [56-293] 0.7 [-1-2.4] 141 [72-276] 0.36*
Vitamin C (mg) - - 187 [69-501] - - 193 [78-473] 0.36
Mean     129       150   0.21
*P <0.05
- indicates that data were not computed because of heteroscedasticity of the difference.
Results obtained from 29 female subjects based on bias and precision (Bland – Altman plots) and intra-class correlation coefficient (ICC).
Table 2 : Absolute agreement between FFQ and DR.