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Table 7 Nutrient intake reproducibility between FFQ.1 and FFQ.2

From: Design and validation of a food frequency questionnaire (FFQ) for the nutritional evaluation of food intake in the Peruvian Amazon

Energy and nutrientsraICCb (CI 95%)CCCc (CI 95%)
UnadjustedAdjusted
Energy (Kcal)0.877**0.877 (0.825–0.915) 0.876 (0.824–0.914)
Proteins (g)0.609**0.608 (0.473–0.715)0.906 (0.858–0.937)0.905 (0.864–0.934)
Fats (g)0.751**0.751 (0.655–0.824)0.850 (0.787–0.895)0.849 (0.787–0.894)
Carbohydrates (g)0.843**0.838 (0.771–0.887)0.799 (0.718–0.859)0797 (0.716–0.857)
Ca (mg)0.224*0.128(− 0.001–0.382)0.120(− 0.043–0.285)0.119(− 0.016–0.250)
P (mg)0.950**0.767 (0.675–0.836)0.238 (0.036–0.419)0.236 (0.106–0.359)
Na (mg)0.947**0.926 (0.894–0.949)0.915 (0.877–0.941)0.914 (0.877–0.940)
K (mg)0.753**0.787 (0.703–0.850)0.710 (0.601–0.793)0.708 (0.599–0.791)
Fe (mg)0.717**0.717(0.610–0.798)0.691(0.577–0.779)0.689(0.575–0.776)
Tiamin (mg)0.760**0.759(0.665–0.829)0.667(0.547–0.761)0.665 (0.545–0.758)
Riboflavin (mg)0.683**0.672(− 0.060–0.883)0.230(− 0.085–0.500)0.228 (0.133–0.319)
Vitamin B6 (mg)0.778**0.791 (0.707–0.853)0.718 (0.605–0.801)0.716 (0.612–0.794)
Folic Acid (μg)0.783**0.756 (0.661–0.827)0.711 (0.603–0.794)0.709 (0.600–0.792)
Vitamin B12 (μg)0.628**0.582 (0.401–0.711)0.747 (0.631–0.828)0.746 (0.650–0.972)
Vitamin C (μg)0.742**0.728 (0.622–0.807)0.658 (0.532–0.755)0.656 (0.539–0.784)
Vitamin A (μg)0.1210.005(− 0.187–0.196)0.012(− 0.181–0.203)0.09(− 0.028–0.045)
Vitamin D (μg)0.1880.190(− 0.001–0.368)0.096(− 0.082–0.273)0.002(− 0.009–0.013
  1. ar, Pearson’s correlation coefficient, level of statistical significance: *P < 0.05, **P < 0.01
  2. bICC Intraclass correlation coefficient
  3. cCCC Lin’s concordance correlation coefficient