Table 3 Attenuation factors, correlation between dietary assessment tool and true intake and mean difference between self-report tool and reference intake for protein, potassium, sodium and total sugar intake and density as assessed by myfood24 and interviewer-based 24-h recall

0.30 (0.21, 0.38)

0.43 (0.32, 0.53)

+1% (−4%, + 7%)

0.38 (0.29, 0.47)

0.48 (0.39, 0.58)

+ 11% (+ 6%, + 17%)

0.31 (0.21, 0.41)

0.40 (0.28, 0.52)

+ 26% (+ 19%, + 35%)

0.35 (0.23, 0.46)

0.38 (0.27, 0.49)

+ 48% (+ 39%, + 57%)

0.21 (0.12, 0.30)

0.30 (0.18, 0.41)

+ 22% (+ 13%, + 32%)

0.22 (0.11, 0.32)

0.28 (0.15, 0.40)

+ 28% (+ 18%, + 38%)

0.15 (0.06, 0.24)

0.24 (0.09, 0.38)

−45% (− 39%, − 50%)

0.25 (0.14, 0.36)

0.31 (0.18, 0.44)

−30% (−24%, − 35%)

0.19 (0.10, 0.29)

0.29 (0.15, 0.42)

−31% (− 27%, − 35%)

0.32 (0.21, 0.43)

0.37 (0.25, 0.49)

−23% (− 19%, − 27%)

0.16 (0.03, 0.29)

0.17 (0.03, 0.32)

+ 48% (+ 39%, + 58%)

0.26 (0.11, 0.40)

0.24 (0.11, 0.37)

+ 46% (+ 38%, + 55%)

0.25 (0.09, 0.41)

0.23 (0.09, 0.37)

+ 85% (+ 72%, + 99%)

0.38 (0.23, 0.53)

0.34 (0.22, 0.47)

+ 93% (+ 81%, + 107%)

0.08 (−0.03, 0.19)

0.09 (−0.04, 0.21)

+ 78% (+ 63%, + 94%)

0.11 (−0.02, 0.24)

0.11 (− 0.02, 0.24)

+ 66% (+ 52%, + 80%)

0.16 (0.04, 0.28)

0.21 (0.06, 0.36)

−19% (− 11%, − 26%)

0.23 (0.09, 0.37)

0.25 (0.10, 0.39)

−8% (+ 0%, − 15%)