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To evaluate the relative validity of the diet history questionnaire (DHQ) used in the Concord Health and Ageing in Men Project (CHAMP) against a four-day weighed food record (4dWFR) as the reference method.

Detailed DHQ followed by a 4dWFR were completed between July 2012 and October of 2013. Setting: Burwood, Canada Bay and Strathfield in Sydney, Australia.

Fifty six community- dwelling men aged 75 years and over (mean=79 years).

DHQ estimates of intakes were generally higher than estimates from 4dWFR. Differences between the two methods were generally less than 20% with the exception of ß-carotene (37%). Fixed and proportional biases were only present for retinol, ß-carotene, magnesium, phosphorus …