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Table 2 Geometric means and 95% confidence interval (CI) for protein, potassium, sodium and total sugar intake and density as assessed by myfood24, interviewer-based 24-h recall and biomarkers relating to the first clinic visit

From: Validity of an online 24-h recall tool (myfood24) for dietary assessment in population studies: comparison with biomarkers and standard interviews

  myfood24 Interviewer-based 24-h recall Biomarker/reference tool
n Geometric mean (95% CI) n Geometric mean (95% CI) n Geometric mean (95% CI)
Nutrient intake:
 Protein (g) 208 70.5 (66.1, 75.2) 197 81.7 (77.3, 86.4) 192 68.4 (64.1, 72.8)
 Potassium (g) 208 2.7 (2.5, 2.9) 197 3.1 (3.0, 3.3) 192 2.1 (1.9, 2.3)
 Sodium (g) 208 2.3 (2.1, 2.5) 197 2.4 (2.2, 2.6) 192 1.8 (1.7, 2.0)
 Total sugars (g) 208 72.8 (66.4, 79.8) 197 91.0 (85.0, 97.5) 191 128.3 (115.9, 142.0)
Energy expenditure:
 Total energy expenditure (MJ) 208 7.5 (7.1, 7.9) 197 8.5 (8.1, 8.9) 185 11.0 (10.5, 11.6)
Nutrient density:a
 Protein (g/MJ) 208 9.5 (9.0, 9.9) 197 9.6 (9.2, 10.0) 180 6.2 (5.8, 6.7)
 Potassium (g/MJ) 208 0.36 (0.35, 0.38) 197 0.37 (0.35, 0.39) 180 0.19 (0.18, 0.21)
 Sodium (g/MJ) 208 0.31 (0.29, 0.33) 197 0.28 (0.27, 0.30) 180 0.16 (0.15, 0.18)
 Total sugars (g/MJ) 208 9.8 (9.1, 10.5) 197 10.7 (10.1, 11.4) 179 11.6 (10.4, 12.9)
  1. aNutrient density for protein, potassium, sodium and total sugars was expressed in g/MJ of total energy intake
  2. The n is the number of participants who had both the dietary assessment measure and the biomarker