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Table 3 Reliability of food groups and nutrients intakes between the SFFQ1 and SFFQ2(n = 239)

From: Validity and reliability of a simplified food frequency questionnaire: a cross sectional study among physical health examination adults in southwest region of China

Food groups/Nutrients SFFQ1 SFFQ2 ICC
Mean(SD) Mean(SD) Unadjusted Energy-adjusted
Food groups(g/d)
Cereal 210.7(96.6) 246.4(83.8) 0.63** 0.67**
Bread and noodle 63.2(45.8) 72.4(58.6) 0.46* 0.49*
Tubers 20.6(27.2) 25.4(18.9) 0.55* 0.58*
Read meat 86.9(60.1) 97.5(53.7) 0.53** 0.57**
Poultry 52.2(42.8) 64(38.9) 0.50* 0.56*
Aquatic products 59.1(76.7) 62(72.7) 0.62* 0.53*
Haslet and processed meat products 17.5(27.6) 14.3(29.4) 0.50* 0.57*
Eggs 31.4(28.9) 40.7(19.6) 0.58** 0.69**
Dairy 92.9(110.5) 101(114.7) 0.62** 0.65**
Vegetables 238.8(144.5) 247(152) 0.71** 0.73**
Phytocomycetes 16.5(21.0) 24.1(18.8) 0.49* 0.54*
Soy products 31.9(47.9) 34.1(39.6) 0.50* 0.54*
Fruits 112.3(116.9) 121.2(89.7) 0.63** 0.67**
Nuts 13.5(23.8) 20.7(18.9) 0.51* 0.53*
Nutrients
Energy(Kcal/d) 1786.3(523.4) 1820.2(220.1) 0.72** _
Protein(g/d) 53.4(21.3) 60.3(10.8) 0.64* 0.68*
Carbohydrate(g/d) 207.2(38.4) 216.4(58.2) 0.62** 0.70**
Fat(g/d) 32.7(12.1) 35.6(9.2) 0.53* 0.69*
Dietary fiber(g/d) 49.5(54.4) 52.3(27.4) 0.34* 0.39*
Vitamin A(ugRE/d) a 742.3(312.3) 772.7(603.4) 0.73* 0.76*
Vitamin B1(mg/d) 0.68(0.11) 0.74(0.31) 0.65* 0.70*
Vitamin B2(mg/d) 1.38(0.43) 1.2(0.2) 0.38* 0.40*
Vitamin C(mg/d) 115.2(41.3) 122.6(34.7) 0.67** 0.75**
Vitamin E(mg/d) 70.1(48.7) 73.4(54.7) 0.59** 0.62**
Calcium(mg/d) 567.2(162.4) 556.2(168.3) 0.52* 0.64*
Iron(mg/d) 7.1(2.2) 8.2(1.9) 0.64** 0.71**
  1. Note: Standard deviation: SD, Intra-class correlation coefficient: ICC.
  2. a: Sum of retinol, β-carotene, α-carotene, and cryptoxanthin. * P < 0.05. **P < 0.01.