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. 2013 Oct 16;143(12):1999–2006. doi: 10.3945/jn.113.181099

FIGURE 1.

FIGURE 1

Percentage of U.S. population aged ≥4 y with dietary intakes below the EAR based on current intakes and assuming constant %DVs in fortified foods under 2 potential DV scenarios (data from WWEIA, NHANES 2007–2008; n = 7976). Potential DV scenarios: in model 1, the DV corresponds to the population-weighted EAR, and in model 2, the DV corresponds to the population-coverage RDA; in each scenario, levels of fortified nutrients were adjusted to maintain the current %DV. We assumed that the revised DV for folate will be in terms of micrograms DFE. Usual proportions below the EAR were estimated from PC-SIDE (Department of Statistics, Iowa State University) with jackknife weights; covariates included day of recall and weekend/weekday day. For iron, usual proportions below the EAR were estimated by using the probability approach. DFE, Dietary Folate Equivalent; DV, Daily Value; EAR, Estimated Average Requirement; PC-SIDE, Software for Intake Distribution Estimation for the Windows Operating System; WWEIA, What We Eat in America.