Correlation [95% CI] Ranking
  Daily nutrient intake Unadjusted Energy-adjusted Unadjusted Energy-adjusted
      Same tertile (%) Extreme tertile (%) ĸ [95% CI] Same tertile (%) Extreme tertile (%) ĸ [95% CI]
Macro-nutrients   Energy (Kcal ) 0.14   34.5 17.2 0.02      
  [-0.24;0.48]   [-0.25;0.28]  
  Water (g) 0.47* 0.71* 41.4 3.4 0.12 65.5 0 0.48
  [0.11;0.71] [0.45;0.85] [-0.16;0.39] [0.22;0.74]
  Protein (g) 0.18 0.29 48.3 17.2 0.22 41.4 17.2 0.12
  [-0.20;0.51] [-0.09;0.59] [-0.05;0.50] [-0.15;0.39]
Lipids Lipid (g) 0.29 0.47* 41.4 10.3 0.12 55.2 10.3 0.33
[-0.09;0.59] [0.11;0.71] [-0.15;0.39] [0.05;0.60]
SFA (g) 0.25 0.34 31.03 13.8 -0.04 48.3 10.3 0.22
[-0.13;0.56] [-0.03-0.63] [-0.29;0.22] [-0.05;0.50]
MUFA (g) 0.22 0.48* 37.9 13.8 0.07 51.7 13.8 0.28
[-0.16;0.54] [0.13;0.72] [-0.20;0.33] [0;0.55]
PUFA (g) 0.4* 0.38* 44.8 13.8 0.17 48.3 10.3 0.22
[0.04;0.67] [0;0.65] [-0.10;0.45] [-0.05;0.50]
Linoleic acid (g) 0.39* 0.33 51.7 6.9 0.28 48.3 10.3 0.22
[0.02;0.66] [-0.05;0.62] [0;0.55] [-0.05;0.50]
Cholesterol (mg) 0.17 0.05 37.9 13.8 0.07 41.4 17.2 0.12
[-0.21;0.51] [-0.32;0.41] [-0.20;0.33] [-0.15;0.39]
  Carbohydrates Sugar (g) 0.16 0.67* 48.3 17.2 0.22 48.3 3.4 0.22
[-0.22;0.50] [0.40;0.83] [-0.05;0.50] [-0.05;0.50]
Starch (g) 0.25 0.36 27.6 17.2 -0.09 34.5 10.3 0.02
[-0.14;0.56] [-0.02;0.64] [-0.34;0.16] [-0.25;0.28]
Fiber (g) 0.11 0.45* 37.9 27.6 0.07 48.3 10.3 0.22
[-0.27;0.46] [0.09;0.69] [-0.20;0.33] [-0.05;0.50]
Micro-nutrients Minerals Calcium (mg) 0.58* 0.55* 55.2 10.3 0.33 48.3 10.3 0.22
[0.26;0.78] [0.22;0.76] [0.05;0.60] [-0.05;0.50]
Iron (mg) 0.31 0.65* 34.5 10.3 0.02 69 3.4 0.53
[-0.07;0.60] [0.36;0.82] [-0.24;0.28] [0.28;0.79]
Potassium (mg) 0.3 0.67* 44.8 13.8 0.17 48.3 3.4 0.22
[-0.08;0.60] [0.39;0.83] [-0.10;0.44] [-0.05;0.50]
Magnesium (mg) 0.33 0.42* 41.4 10.3 0.12 51.7 6.9 0.28
[-0.05;0.62] [0.05;0.68] [-0.15;0.39] [0;0.55]
Sodium (mg) 0.18 0.64* 44.8 13.8 0.17 65.5 0 0.48
[-0.21;0.51] [0.35;0.81] [-0.10;0.44] [0.22;0.75]
Phosphorus (mg) 0.31 0.51* 44.8 13.8 0.17 48.3 10.3 0.22
[-0.07;0.60] [0.17;0.74] [-0.10;0.45] [-0.05;0.50]
Zinc (mg) 0.35 0.65* 41.4 10.3 0.12 62.1 3.4 0.43
[-0.02;0.63] [0.36;0.82] [-0.15;0.39] [0.16;0.70]
Copper (mg) 0.34 0.49* 44.8 13.8 0.17 55.2 3.4 0.33
[-0.04;0.62] [0.14;0.72] [-0.10;0.44] [0.05;0.60]
  Vitamins Vitamin A (µg) -0.1 0.02 31.03 27.6 -0.04 41.4 24.1 0.12
[-0.45;0.27] [-0.35;0.39] [-0.29;0.22] [-0.15;0.39]
Vitamin B12 (µg) 0.33 0.24 51.8 13.8 0.28 41.4 17.2 0.12
[-0.05;0.61] [-0.14;0.56] [0;0.55] [-0.15;0.39]
Vitamin E (mg) 0.25 0.28 44.8 13.8 0.17 31 13.8 -0.04
[-0.14;0.56] [-0.10;0.58] [-0.10;0.45] [-0.29;0.22]
Vitamin B1 (mg) 0.46* 0.65* 58.6 6.9 0.38 48.3 3.4 0.22
[0.11;0.70] [0.36;0.82] [0.11;0.65] [-0.05;0.50]
Vitamin B2 (mg) 0.54* 0.67* 62.07 10.3 0.43 55.2 3.4 0.33
[0.21;0.76] [0.39;0.83] [0.17;0.69] [0.05;0.60]
Vitamin C (mg) 0.65* 0.69* 48.3 10.3 0.22 62.1 10.3 0.43
[0.36;0.82] [0.42;0.84] [-0.05;0.5] [0.17;0.69]
  Mean 0.3 0.47 43.5 13.5 0.15 50.4 9.1 0.25
SFA: saturated fatty acids; MUFA: mono-unsaturated fatty acids; PUFA: poly-unsaturated fatty acids; LOA: Limits of Agreement.
*P <0.05, ĸ: Weighted Kappa coefficient Unadjusted and energy-adjusted intakes obtained from 29 female subjects based on Spearman’s correlation coefficients and the cross-classification of data into 3-category food intake (low, medium and high). Percent of subjects with FFQ correct classifications and percent of subject with FFQ grossly misclassified (extreme category).
SFA: Saturated fatty acids; MUFA : Mono-unsaturated fatty acids; PUFA : Poly-unsaturated fatty acids.
Table 3: Relative agreement between FFQ and DR.