Table 5

Mean daily intakes and Intraclass Correlation Coefficients between intakes estimated from the two-time DHQ (n = 58)

1st DHQ

2nd DHQ

1st DHQ + 2nd DHQ Intraclass Correlation Coefficient


Mean ± SD

Mean ± SD

p1


Energy [kcal/day]

1727 ± 407

1771 ± 399

0.523

0.599

Folate [μg/day]2

292 ± 120

279 ± 112

0.257

0.725

Vitamin B12 [μg/day]2

5.37 ± 2.79

5.91 ± 2.95

0.052

0.512


DHQ: self-administered diet history questionnaire

1The paired t-test

2The analyses were performed after log-transformation of the variables to achieve normal distribution

Shiraishi et al. Nutrition Journal 2012 11:15   doi:10.1186/1475-2891-11-15

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