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Table 4 Mean ± (SD), mean difference, Intraclass Correlation Coefficients (ICC), Spearman correlation coefficients, weighted kappa (κw) and percent agreement for energy and nutrients as measured using FFQ-1 and FFQ-2 (n = 111)

From: Validity and reliability of a food frequency questionnaire to estimate dietary intake among Lebanese children

Nutrients Mean FFQ-1 Mean FFQ-2 ICC Spearman’s r a κw Percent agreement (same & adjacent quartile)
Energy (Kcal) 2560.86 ± 822.32 2421.20 ± 793.40 0.71** 0.77** 0.61 92.79
Protein (g) 81.71 ± 25.88 81.03 ± 30.33 0.65** 0.65** 0.51 84.68
Carbohydrate (g) 351.87 ± 120.07 330.39 ± 113.17 0.68** 0.64** 0.62 93.69
Fat (g) 96.47 ± 35.70 89.81 ± 33.39 0.71** 0.65** 0.69 91.89
Saturated fat (g) 30.17 ± 12.47 28.25 ± 10.53 0.70** 0.57** 0.52 90.99
MUFA (g) 34.87 ± 13.31 32.54 ± 13.26 0.69** 0.56** 0.59 92.79
PUFA (g) 20.80 ± 10.35 18.96 ± 8.85 0.64** 0.55** 0.55 90.09
Trans-fatty acid (g) 0.16 ± 0.16 0.14 ± 0.13 0.31** 0.49** 0.41 85.58
Calcium (mg) 996.76 ± 365.68 975.27 ± 364.05 0.73** 0.67** 0.51 90.09
Iron (mg) 19.09 ± 7.15 18.05 ± 7.82 0.70** 0.68** 0.55 90.09
Fiber (g) 23.36 ± 9.60 20.51 ± 8.26 0.58** 0.65** 0.55 93.69
Sugar (g) 113.47 ± 47.94 99.17 ± 39.70 0.62** 0.52** 0.58 92.79
  1. **P value < 0.01
  2. aAdjustment for energy was carried using the residual method