Two new meal- and web-based interactive food frequency questionnaires: validation of energy and macronutrient intake.

J Med Internet Res · 2013 · PMC3713929 · PMID 23739995

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a weak trendno p-value reported

Compared to the WFR, the questionnaires had a larger underestimation, larger variance, and a weak trend of decreasing accuracy with increasing intakes.

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