Validation of digital photographs, as a tool in 24-h recall, for the improvement of dietary assessment among rural populations in developing countries.

Nutr J · 2012 · PMC3547686 · PMID 22931128

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highly significantno p-value reported

Spearman’s correlation coefficients were highly significant ( r from 0.75 for eggs to 0.98 for potato and cassava).

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