Skip to main content

Table 2 Median nutrient intake between two FFQ and average of 24-HDR among participants in Shanghai Diet and Health Study

From: Validity and reliability of a food frequency questionnaire for assessing dietary intake among Shanghai residents

Energy and nutrients FFQ1 FFQ2 24-HDR Wilcoxon ranked test P values
Median 25–75th percentile Median 25–75th percentile Median 25–75th percentile FFQ1 VS FFQ2 24-HDR FFQ2
Energy(kcal) 1566.5 1310.1–1869.6 1561.9 1280.2–1838.4 1515.2 1222.2–1819.7 0.16 0.06
Protein(g) 54.3 42.5–65.8 52.9 42.4–64.5 58.7 45.9–74.2 0.07 0.08
Fat(g) 49.8 37.2–64.7 47.9 34.9–61.9 60.9 46.6–78.8 0.13 < 0.01
Carbohydrate (g) 227.3 180.8–277.9 228.1 182.2–275.2 173.3 134.5–220.3 0.12 < 0.01
Protein(% energy) 13.7 12.0–15.4 13.6 11.9–15.4 15.6 13.3–18.1 0.21 0.05
Fat(% energy) 28.6 22.7–34.6 27.6 21.3–33.6 37.3 30.2–45.4 0.17 < 0.01
Carbohydrate (% energy) 58.5 52.6–64.4 59.5 53.2–65.9 46.8 40.1–53.9 0.10 < 0.01
Vitamin A(μg) 300.3 214.9–407.8 301.3 213.8–400.2 361.6 242.1–508 0.12 < 0.01
Carotene(μg) 936.0 640.6–1359.2 951.0 634.2–1285 1244.0 704.3–2016.8 < 0.01 < 0.01
Retinol(μg) 133.9 83.4–191.2 129.1 78.3–189.6 131.1 84.3–189 0.05 0.13
Vitamin D(IU) 12.0 4.2–23.8 6.0 2.2–13.6 0.0 0.00 < 0.01 < 0.01
Vitamin E(mg) 19.7 13.1–26.4 17.8 10.2–24.9 22.2 15.6–31.6 0.03 0.58
Vitamin K(μg) 8.1 4.3–13.7 12.5 6.4–21.5 0.0 0.00 0.01 < 0.01
Thiamine(mg) 0.6 0.5–0.8 0.6 0.5–0.8 0.7 0.5–0.9 0.12 0.06
Riboflavin(mg) 0.7 0.5–1 0.7 0.5–0.9 0.8 0.6–1 0.08 0.07
Niacin(mg) 10.5 8.3–13.1 10.8 8.7–13.3 13.1 10.1–16.8 0.24 0.21
Folate (μg) 9.9 6.1–14.9 10.7 7.2–16.8 2.8 0.1–16.2 0.14 < 0.01
Biotin(μg) 1.1 0.5–1.8 0.8 0.4–1.4 0.3 0.0–0.9 0.06 0.01
Choline(mg) 6.6 2.5–14.6 3.2 0.5–10 0.0 0.0–1.9 < 0.01 < 0.01
Vitamin C (mg) 46.9 32.1–63.7 47.4 32.2–63.8 58.0 37.8–83.2 0.19 0.06
Calcium (mg) 352.6 230.6–530 341.3 232.9–506.8 376.3 259.9–548.2 0.01 < 0.01
Phosphorus (mg) 786.8 602.5–966.4 761.4 602.6–949.7 818.8 650.7–994.3 < 0.01 < 0.01
Potassium (mg) 1386.3 1029.9–1781.1 1313.3 1001.3–1660.3 1495.2 1129.0–1924.2 < 0.01 < 0.01
Sodium (mg) 3622.8 1001.9–5115.5 2950.9 638.0–4721.8 3914.8 2809.7–5504.2 < 0.01 < 0.01
Magnesium (mg) 212.4 166.7–262.7 208.4 169.2–255.9 221.6 173.3–280.1 0.21 0.09
Iron (mg) 14.5 11.7–18.1 14.1 11.6–17.5 16.2 13.1–20.9 0.58 0.01
Zinc (mg) 8.5 6.9–10.2 8.5 7.0–10.3 8.5 6.7–10.4 0.20 0.61
Selenium(μg) 39.3 28.8–49.9 37.5 28.8–49.8 43.3 30.1–56.8 0.12 < 0.01