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Table 1 Pearson correlation coefficient between mean daily intakes of nutrients estimated by 7DWR and an FFQ

From: Validity of a food frequency questionnaire to assess nutritional intake among Sri Lankan adults

Energy and nutrient (n = 77) Intake from 7-day diet diary FFQ r value p value
Mean SD Mean SD
Energy (kcal/d) 1697.9 333.3 1794.1 397.6 0.39 <0.001
Protein (g) 53.4 12.9 50.1 11.0 0.26 0.02
Fat (g) 39.4 9.9 46.1 12.9 0.17 0.14
Carbohydrate (g) 292.4 65.9 303.9 75.7 0.47 <0.001
Dietary fiber (g) 14.1 5.4 21.8 9.4 0.32 0.005
PUFA (g) 2.7 1.4 2.4 1.8 0.37 <0.001
Cholesterol (mg) 15.8 25.0 9.4 7.9 0.23 0.05
Vitamin A (μg) 426.3 172.5 652.3 292.6 0.17 0.19
Vitamin E (mg) 1.9 1.4 2.6 1.3 0.09 0.46
Vitamin B1 (mg) 1.6 0.5 1.5 0.4 0.26 0.02
Vitamin B2 (mg) 1.2 0.6 1.2 0.4 0.25 0.03
Vitamin B6 (mg) 1.2 0.6 1.3 1.0 0.36 0.001
Folic acid (mg) 39.0 16.5 45.5 21.7 0.46 <0.001
Vitamin D (μg) 7.2 7.6 7.6 7.8 0.29 0.01
Vitamin C (mg) 33.9 21.4 67.9 42.3 0.21 0.07
Potassium (mg) 1765.5 484.6 1963.2 577.2 0.26 0.02
Calcium (mg) 540.7 145.2 677.4 229.4 0.33 0.004
Magnesium (mg) 258.0 100.2 308.9 124.7 0.46 <0.001
Phosphorus (mg) 1020.3 225.3 1107.4 292.2 0.36 0.002
Sodium (mg) 1812.7 790.2 1834.3 856.1 0.16 0.17
Iron (mg) 16.7 9.2 19.7 9.7 0.25 0.03
Zinc (mg) 7.1 1.8 7.3 2.3 0.12 0.28
% Energy from fata 19.8 3.9 22.1 4.1 0.34 0.002
% Energy from proteina 12.3 2.3 11.1 1.4 0.52 0.0001
% Energy from carbohydratea 67.6 5.1 66.7 4.8 0.40 0.0001
  1. aPercentage of energy deriving from nutrients were calculated by below equation (energy from a given nutrient/total energy intake × 100)