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Table 5 Percentage of agreement for the classification into quartiles of the distribution of selected dietary variables using either FFQ1 or FFQ2.

From: Validity and reproducibility of an interviewer-administered food frequency questionnaire for healthy French-Canadian men and women

  Lowest quartile with FFQ1 and FFQ2 (%) Highest quartile with FFQ1 and FFQ2 (%) Exact agreement across quartiles (%)
Energy (kcal) 75.0 75.0 62.5
Protein (g) 28.6 75.0 37.5
CHO (g) 50.0 75.0 59.4
Lipids (g) 50.0 62.5 40.6
SFA (g) 50.0 37.5 34.4
MUFA (g) 62.5 37.5 40.6
PUFA (g) 50.0 62.5 46.7
Trans fat (g) 62.5 50.0 40.6
Cholesterol (mg) 37.5 50.0 40.6
Dietary fiber (g) 62.5 50.0 43.8
Alcohol (g) 75.0 75.0 56.3