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Table 2 Mean ± SD, mean difference, Spearman’s correlation (r), % agreement and 95 % Limits of Agreement (LOA) for selected energy and nutrients intakes as measured by FFQ-1 and mean 24-HRs (n = 111)

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

Nutrients FFQ-1 24-HRs Mean difference Spearman’s ra Percent agreement (same & adjacent quartile) 95 % LOA
Mean ± SD Mean ± SD
Energy (Kcal) 2560.86 ± 822.32 1760.66 ± 489.26 800.20 ± 689.88 0.54** 81.08 −1015.12 −170.37
Protein (g) 81.71 ± 25.88 60.71 ± 19.23 21.00 ± 26.22 0.33** 78.38 −28.36 9.03
Carbohydrate (g) 351.87 ± 120.07 229.87 ± 63.52 121.99 ± 105.15 0.38** 81.98 −170.79 −52.54
Fat (g) 96.47 ± 35.70 68.42 ± 25.82 28.04 ± 29.15 0.33** 84.68 −13.35 −2.16
Saturated fat (g) 30.17 ± 12.47 21.00 ± 7.49 9.17 ± 11.06 0.39** 81.98 −14.16 7.89
MUFA (g) 34.87 ± 13.31 24.20 ± 10.02 10.67 ± 10.92 0.26** 87.39 −5.58 6.13
PUFA (g) 20.80 ± 10.35 15.89 ± 9.92 4.91 ± 9.99 0.33** 81.08 −0.48 8.25
Trans-fatty Acid (g) 0.16 ± 0.16 0.10 ± 0.10 0.05 ± 0.16 0.34** 76.58 −0.06 0.02
Calcium (mg) 996.76 ± 365.68 628.19 ± 231.70 368.56 ± 364.47 0.44** 79.28 −382.53 44.68
Iron (mg) 19.09 ± 7.15 13.37 ± 4.65 5.72 ± 5.83 0.45** 80.18 −6.00 0.28
Fiber (g) 23.36 ± 9.60 15.00 ± 5.03 8.36 ± 8.77 0.37** 79.28 −12.12 −3.61
Sugar (g) 113.47 ± 47.94 63.28 ± 21.72 50.24 ± 43.25 0.35** 84.68 −55.86 −19.57
  1. **P value < 0.01
  2. aAdjustment for energy was carried using the residual method