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Table 5 Food frequency questionnaires at visits 1 and 2: Comparison of nutrient median (inter-quartile range) daily intake and intraclass 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  
FFQ V1 FFQ V2b Difference % (IQR)a Correlationsc
Energy (kcal) 2533 (2036–2892) 2416 (1941–3062) 4.9 (−16.6–18.7) 0.84***
Protein (g) 106 (92.3–127) 100 (88.4–140) 4.8 (− 15.9–12.8) 0.79***
CHO (g) 308 (254–380) 296 (226–368) 4.9 (− 10.9–24.7) 0.81***
Lipids (g) 91 (67.2–103) 85.7 (68.7–114) −7.0 (− 15.4–13.0) 0.76***
SFA (g) 28.0 (19.0–31.6) 26.8 (22.8–37.0) −4.3 (− 21.9–15.3) 0.81***
MUFA (g) 30.3 (24.3–39.0) 30.9 (24.4–43.5) −6.8 (− 17.9–18.2) 0.62**
PUFA (g) 16.5 (12.2–20.1) 18.1 (13.9–21.9) −12.4 (− 29.2–1.2) 0.56*
Cholesterol (mg) 265 (201–334) 319 (210–423) −7.4 (− 24.2–6.7) 0.83***
Dietary fiber (g) 23.8 (15.9–29.9) 24.2 (16.2–31.4) −4.4 (− 22.6–16.4) 0.63**
Alcohol (g) 2.8 (1.1–12.4) 3.3 (1.5–12.7) − 6.2 (− 29.0–4.5) 0.92***
Vitamin A (μg) 904 (737–1158) 974 (775–1357) −8.5 (− 19.3–15.0) 0.68**
Vitamin C (mg) 191 (131–254) 178 (121–214) − 6.0 (− 16.1–19.9) 0.83***
Vitamin E (mg) 8.8 (6.7–12.9) 8.8 (6.9–12.7) 4.0 (−21.2–20.6) 0.86***
Vitamin D (IU) 224 (168–260) 237 (191–281) −0.6 (− 13.4–18.6) 0.88***
Calcium (mg) 1220 (1045–1627) 1240 (1106–1552) −3.6 (− 15.2–12.5) 0.87***
Iron (mg) 15.6 (13.7–19.1) 15.3 (12.8–19.1) − 0.9 (− 14.0–19.6) 0.76***
Folate (mcg) 452 (398–684) 507 (387–664) 0.0 (−22.4–12.0) 0.76***
  1. Values are median (IQR), N = 29
  2. IQR inter-quartile range, 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 S10
  4. *P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.0001. V1, visit 1; V2, visit 2
  5. a(Daily intake as per FFQ V1 – Daily intake as per FFQ V2)/(Daily intake as per FFQ V2) × 100
  6. bWilcoxon signed-rank tests were used to compare values obtained from both FFQ V1 and FFQ V2. No statistical differences were found
  7. cIntraclass correlations between FFQ V1 and FFQ V2 based on log transformed values. Analyses were completed on crude values not adjusted for energy intake