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  • Title: A two-year dietary survey of middle-aged women: repeated dietary records as a measure of usual intake.
    Author: Sempos CT, Johnson NE, Smith EL, Gilligan C.
    Journal: J Am Diet Assoc; 1984 Sep; 84(9):1008-13. PubMed ID: 6470368.
    Abstract:
    A two-year survey of the dietary consumption and supplement use patterns of adult women was conducted at the University of Wisconsin-Madison. Participants were asked to record their diet on two randomly selected days per month over a two-year period. Each subject filled out an average of 19 records a year, for an overall 71% return rate. Because of the sampling design, it was possible to estimate each woman's "usual" or average daily dietary and total intake (diet plus supplements) of 15 nutrients. Many women were consuming usual amounts of energy, calcium, iron, magnesium, vitamin B-6, and, especially, zinc and total folate that were 30% to 50% below recommended levels. It was also found that the women generally took vitamin/mineral supplements for nutrients already adequately supplied in the diet. Low nutrient intakes may have been due, in part, to underreporting of food intakes.
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