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Objective To understand how days with atypical food intake affect estimates of usual nutrient intake from 4-day food records.Participants/Setting Secondary analyses of 4-day food records (4DFRs) (n=2,560) collected from 1,090 women, aged 50 to 79 years, who participated in the Women's Trial Feasibility Study in Minority Populations, a randomized dietary intervention trialDesign Food records were classified...