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Table 2 Mean daily nutrient intakes from each dietary assessment method (n = 50)

From: Feasibility of a commercial smartphone application for dietary assessment in epidemiological research and comparison with 24-h dietary recalls

  Average of 4-d food diary (RFD app) Average of two 24-h dietary recalls
Mean ± SD Range Mean ± SD Range
Energy intake (kJ) 8854 ± 2267 4907, 16709 9123 ± 2337 4842, 14128
Protein intake (% E) 19.7 ± 4.9 12.1, 35.5 19.3 ± 4.3 10.2, 31.8
Total fat intake (% E) 34.0 ± 6.2 21.0, 50.1 34.8 ± 6.7 23.4, 57.8
Saturated fat (% E) 12.0 ± 2.8 4.6, 18.6 12.4 ± 2.9 4.2, 18.6
Polyunsaturated fat (% E) 6.0 ± 3.0 3.3, 22.3 6.0 ± 2.7 1.9, 20.5
Carbohydrate intake (% E) 39.8 ± 8.0 16.1, 56.5 40.4 ± 7.8 22.5, 57.6
Added sugar intake (% E) 5.0 ± 3.4 0.1, 15.0 6.2 ± 4.3 0.0, 16.5
Alcohol intake (% E) 2.1 ± 3.4 0.0, 15.2 1.3 ± 2.4 0.0, 9.5
Dietary fibre density (g/ MJ energy intake) 3.6 ± 1.3 1.9, 7.3 3.6 ± 1.2 2.0, 6.8
Calcium density (mg/ MJ energy intake) 117.6 ± 38.0 37.8, 295.5 111.7 ± 29.0 29.1, 187.6
Iron density (mg/ MJ energy intake) 1.6 ± 0.5 0.5, 2.9 1.5 ± 0.4 0.4, 2.8