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Table 2 Mean ± (SD), Intraclass Correlation Coefficients (ICC) and Spearman correlation coefficients for energy and 13 nutrients between two DFFQs (n = 161)

From: Validity and reliability of a dish-based semi-quantitative food frequency questionnaire for assessment of energy and nutrient intake among Iranian adults

Energy and 12 nutrientsFFQ_1 M ± SDFFQ_2 M ± SDSpearman’s rICC
Energy (kcal/day)3653.7 ± 19403004.8 ± 10940.600.76
Protein (g/day)113.6 ± 6196.3 ± 36.90.540.68
Fat (g/day)114.2 ± 66.594 ± 37.10.600.75
Carbohydrate (g/day)559.8 ± 305.8458 ± 173.60.140.23
Dietary fiber (g/day)30.5 ± 1826.2 ± 110.550.74
Cholesterol (mg/day)332.9 ± 214.4317.7 ± 163.10.560.72
Thiamin (mg/day)3.2 ± 1.92.6 ± 10.550.76
Riboflavin (mg/day)2.2 ± 1.11.8 ± 0.70.520.71
Vitamin C (mg/day)357 ± 241.5327.6 ± 170.70.480.66
Vitamin E (mg/day)5.5 ± 7.74.1 ± 30.420.48
Folate (μg/day)467.2 ± 242406 ± 162.40.510.75
Calcium (mg/day)1250.7 ± 672.91051.4 ± 410.30.560.70
Iron (mg/day)30.3 ± 18.125.4 ± 10.30.540.69
Zinc (mg/day)30.5 ± 4921.7 ± 27.40.460.42
  1. Adjustment for energy was carried using the residual method