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Table 3 Food frequency questionnaires and 3-day food records: Comparison of nutrient median (inter-quartile range) daily intake and correlation coefficients

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

  Median (IQR) daily intake Correlationsc
3-DFR FFQb Difference % (IQR)a Unadjusted Energy-adjustedd
Energy (kcal) 2093 (1860–2518) 2439 (2020–2802)*** 12.1 (−1.1–24.9) 0.72**  
Protein (g) 87.2 (78.4–106) 102 (82.9–122)*** 12.7 (−3.2–32.0) 0.59** 0.47**
CHO (g) 248 (214–307) 295 (254–379)*** 20.0 (1.75–43.0) 0.50** 0.39**
Lipids (g) 82.8 (68.3–103) 84.1 (74.8–103) 2.5 (− 12.9–16.5) 0.74** 0.28*
SFA (g) 28.9 (21.8–37.3) 28.3 (23.7–32.7) −4.7 (− 17.9–18.7) 0.69** 0.33**
MUFA (g) 29.2 (23.1–35.6) 29.8 (25.8–36.8) 2,6 (−14.2–25.9) 0.61** 0.25*
PUFA (g) 15.0 (10.7–19.5) 15.8 (12.8–19.3) 3.2 (− 10.8–26.1) 0.58** 0.33**
Cholesterol (mg) 266 (195–351) 256 (197–332) − 9.1 (− 31.1–32.0) 0.46** 0.24*
Dietary fiber (g) 17.3 (13.6–21.0) 23.8 (18.1–29.8)*** 31.1 (0.4–60.0) 0.50** 0.58**
Alcohol (g) 0.0 (0.0–4.6) 1.1 (0.0–9.5)* 0.59** 0.47**
Vitamin A (μg) 720 (564–988) 950 (747–1171)*** 34.3 (− 8.5–80.4) 0.47** 0.41**
Vitamin C (mg) 122 (74.9–183.2) 187 (139–257)*** 52.6 (14.5–122) 0.55** 0.50**
Vitamin E (mg) 6.2 (4.6–8.4) 8.9 (7.35–10.6)*** 50.6 (16.4–73.5) 0.54** 0.47**
Vitamin D (IU) 176 (114–255) 226 (157–296)** 24.3 (− 16.0–83.1) 0.58** 0.50**
Calcium (mg) 1080 (690–1407) 1307 (1002–1654)*** 23.0 (2.5–49.6) 0.70** 0.52**
Iron (mg) 12.5 (11.0–16.3) 16.0 (13.2–19.0)*** 16.0 (3.7–45.6) 0.49** 0.42**
Folate (mcg) 347 (296–437) 492 (388–620)*** 39.6 (14.4–72.4) 0.46** 0.41**
  1. Values are median (IQR), N = 80
  2. IQR inter-quartile range, 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. Note: Data presented as means ± SD are available in Additional file 1: Table S9
  4. *P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.0001
  5. a(Daily intake as per FFQ – Daily intake as per 3-DFR)/(Daily intake as per 3-DFR) × 100
  6. bWilcoxon signed-rank tests were used to compare values obtained from both FFQ and 3-DFR
  7. cSpearman correlations were used to assess the relationship of energy, nutrient intakes and energy-adjusted nutrient intakes between 3-DFR and FFQ
  8. dThe residual method was used to calculate the energy-adjusted variables