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Table 4 Food frequency questionnaires and 3-day food records: cross-classification analysis of energy and nutrient intakes

From: Development and relative validation of a food frequency questionnaire for French-Canadian adolescent and young adult survivors of acute lymphoblastic leukemia

  % Classified into same quartile1 % Classified into same ±1 quartilea % Misclassifiedb Weightedb Kappa
Energy 47.5 40.0 12.5 0.64
Protein 45.0 37.5 17.5 0.52
CHO 45.0 32.5 22.5 0.46
Lipids 51.3 40.0 8.7 0.70
SFA 50.0 36.3 13.7 0.63
MUFA 35.0 51.3 13.7 0.55
PUFA 48.7 35.0 16.3 0.58
Cholesterol 30.0 51.3 18.7 0.42
Dietary fiber 46.3 30.0 23.7 0.43
Alcohol 57.5 28.7 13.8 0.67
Vitamin A 41.3 33.7 25.0 0.44
Vitamin C 38.7 43.8 17.5 0.47
Vitamin E 41.3 40.0 18.7 0.47
Vitamin D 40.0 41.3 18.7 0.51
Calcium 53.7 33.8 12.5 0.64
Iron 40.0 36.3 23.7 0.37
Folate 37.5 43.7 18.8 0.45
  1. Values are expressed in percentage, N = 80
  2. 3-DFR 3-day food record, FFQ food frequency questionnaire, CHO carbohydrates, SFA saturated fatty acids, MUFA monounsaturated fatty acids, PUFA polyunsaturated fatty acids
  3. aCross-classification analyses were completed to validate agreement between FFQ and 3-DFR in terms of proportions of participants classified into the same or same ±1 quartile or misclassified
  4. bWeighted kappa was used to measure the agreement between FFQ and 3-DFR. Analyses were completed on crude values not adjusted for energy intake