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Table 7 Reproducibility: ICC for nutrient intake as reported in FFQ1 and FFQ2 (n = 52)

From: Development and validation of a quantitative food frequency questionnaire to assess dietary intake among Lebanese adults

 

Mean (SD) nutrient intakes (FFQ1)

Mean (SD) nutrient intakes (FFQ2)

ICC

Confidence Interval

p value

Energy intake (kcal/d)

3074.1 (1768.6)

2772.7 (1486.7)

0.945

0.889–0.971

< 0.001

Protein intake (grams)

126.0 (81.3)

116.8 (75.0)

0.935

0.886–0.963

< 0.001

Protein intake (%)

15.8 (3.1)

16.1 (3.6)

0.879

0.789–0.930

< 0.001

Fat (grams)

127.2 (82.8)

118.8 (72.0)

0.946

0.906–0.969

< 0.001

Fat (%)

35.6 (6.3)

37.0 (6.6)

0.833

0.707–0.904

< 0.001

Carbohydrates (grams)

365.9 (201.2)

316.5 (159.8)

0.913

0.801–0.956

< 0.001

Carbohydrates (%)

47.7 (7.7)

46.1 (8.2)

0.845

0.728–0.911

< 0.001

Sugars (grams)

88.4 (46.5)

77.7 (36.1)

0.826

0.687–0.902

< 0.001

Alcohol (grams)

4.1 (6.0)

3.4 (5.3)

0.852

0.743–0.915

< 0.001

Alcohol (%)

0.9 (1.4)

0.8 (1.0)

0.846

0.733–0.912

< 0.001

Fibers (mg)

36.6 (21.5)

31.3 (16.9)

0.916

0.802–0.959

< 0.001

Cholesterol (mg)

359.8 (461.5)

309.3 (258.7)

0.735

0.541–0.848

< 0.001

Vitamin A (RAE)

1287.4 (1045.9)

1244.0 (1011.3)

0.781

0.618–0.874

< 0.001

Vitamin D (ug)

9.9 (2.9)

9.3 (1.9)

0.645

0.388–0.795

< 0.001

Vitamin E (mg ATE)

16.6 (10.3)

14.6 (7.8)

0.824

0.691–0.900

< 0.001

Vitamin C (mg)

133.1 (77.8)

108.5 (56.9)

0.753

0.544–0.863

< 0.001

Thiamin B1 (mg)

2.3 (1.3)

2.0 (1.1)

0.844

0.715–0.913

< 0.001

Riboflavin B2 (mg)

9.0 (19.6)

8.0 (19.0)

0.959

0.930–0.977

< 0.001

Niacin (mg)

31.2 (20.6)

28.8 (18.3)

0.859

0.756–0.919

< 0.001

Vitamin B5 (mg)

9.1 (5.7)

8.0 (4.6)

0.758

0.580–0.861

< 0.001

Vitamin B6 (mg)

2.8 (1.5)

2.5 (1.3)

0.839

0.714–0.908

< 0.001

Folate (ug)

553.7 (340.9)

474.7 (264.7)

0.849

0.722–0.916

< 0.001

Cobalamin B12 (ug)

6.9 (6.0)

6.6 (5.6)

0.810

0.668–0.891

< 0.001

Magnesium (mg)

482.3 (281.5)

430.3 (224.8)

0.933

0.865–0.965

< 0.001

Calcium (mg)

1118.4 (612.3)

1035.9 (573.3)

0.869

0.773–0.925

< 0.001

Phosphorus (mg)

1979.9 (1130.3)

1828.4 (987.7)

0.940

0.891–0.966

< 0.001

Potassium (mg)

4126.8 (2025.1)

3682.4 (1562.9)

0.900

0.802–0.946

< 0.001

Sodium (mg)

6312.2 (2439.5)

5897.5 (2348.0)

0.958

0.910–0.978

< 0.001

Iron (mg)

24.5 (16.0)

21.7 (12.9)

0.880

0.785–0.932

< 0.001

Zinc (mg)

16.6 (10.7)

14.7 (8.9)

0.824

0.693–0.899

< 0.001

Copper (mg)

2.2 (1.4)

2.0 (1.2)

0.918

0.844–0.955

< 0.001

Manganese (mg)

5.3 (3.4)

4.7 (2.9)

0.951

0.883–0.976

< 0.001

Selenium (ug)

116.6 (99.5)

114.4 (89.5)

0.901

0.827–0.943

< 0.001

  1. FFQ food frequency questionnaire, DR dietary recall, RAE Retinol Activity Equivalent, ICC Intra-class correlation coefficient; Model: 2-way mixed model; Type: absolute agreement