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Table 3 Difference and percent difference of energy and nutrient intakes between values from dietary records and food frequency questionnaires

From: Development and validation of a food frequency questionnaire for Japanese athletes (FFQJA)

Nutrient intake Difference Percent difference (%) p
Energy 185 (− 329, 808)kcal 9.3 (−14.6, 32.3) 0.011
Protein 7.1 (−13.3, 27.0)g 7.2 (−12.8, 41.8) 0.037
Fat −12.4 (−24.6, 11.5)g −14.6 (−29.8, 11.8) 0.007
Carbohydrate 59.7 (−10.3, 141.1)g 5.8 (−1.0, 12.9) < 0.001
Calcium 40 (−121, 188)mg 7.9 (−20.5, 28.3) 0.175
Iron (Fe) −0.3 (−1.8, 2.3) mg −2.7 (− 20.9, 32.2) 0.751
Retinol 67 (−112, 459) ηgRAE 15.4 (−22.7, 82.5) 0.007
Vitamin B1 0.04 (−0.22, 0.45)mg 2.4 (−16.5, 33.1) 0.496
Vitamin B2 0.09 (−0.20, 0.42)mg 4.9 (−14.4, 26.9) 0.044
Vitamin C 4 (−39, 41)mg 5.7 (−34.6, 40.5) 0.672
Dietary fiber −0.7 (−4.8, 2.4)mg −5.5 (−32.3, 24.4) 0.220
  1. Values are shown as median and interquartile range
  2. P: Wilcoxon rank sum test to compare energy and nutrient intake from dietary records and food frequency questionnaires
  3. n = 78