Strategies to Reduce Sodium Intake in the United States (2010) / Chapter Skim
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Appendix E: Background on the National Health and Nutrition Examination Surveys and Data Analysis Methods
Appendix E: Background on the National Health and Nutrition Examination Surveys and Data Analysis Methods
Pages 409-416
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From page 409... ...
More recent data have not been collected, although USDA plans to collect similar household food acquisition and food cost data in 2010 or 2011.
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From page 410... ...
, improvements were made in dietary data collection to produce population-level estimates of total sodium intake to track progress in meeting Healthy People objectives for the dietary guidelines for sodium.2 These improvements included the collection of more than 1 day of intake on at least a subsample of the population and questions about tap water consumption and water softening, dietary supplement use, and salt added at the table, including the type of salt. These additional survey questions were intended to produce more complete estimates of dietary sodium intake.
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From page 411... ...
. A statistical method for estimating usual intake distributions and the proportion below or above defined cutoff values has been developed at Iowa State University and makes use of the second-day dietary recall for this purpose (Carriquiry, 2003)
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From page 412... ...
, and other bottled and sweetened waters were categorized as foods in the beverage category. Finally, data on dietary supplements are collected as part of NHANES, but the incorporation of sodium from dietary supplements requires additional data permutations to link the dietary supplement data set to the foods intake data set.
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From page 413... ...
Income for the survey is also reported on a category basis and is analyzed consistent with standards for reporting nutrition and statistical data for the evaluation of nutrition assistance programs: low-income is defined as an annual household income level of 130 percent of poverty or less, the income eligibility for the Supplemental Nutrition Assistance Program, formerly called the food stamp program; higher-income is defined as an annual household income above 185 percent of poverty, the eligibility cut-off for free- or reduced-price school meals and the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) ; and intermediate income is between 130 and 185 percent of the poverty line.
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From page 414... ...
One-day dietary recall data were used to estimate food sources of sodium and mean daily sodium and sodium density by home versus away food source using the population proportion method as described by KrebsSmith and colleagues (1989)
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From page 415... ...
As discussed earlier, the constantly evolving food supply and increasing globalization make it a challenge to maintain updated food composition databases or databases for supplements that may also undergo formulation changes. Furthermore, new technologies for analyzing samples may change established values for the nutrient content of certain foods.
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From page 416... ...
2006. Evaluation of dietary intake data using the tolerable upper intake levels.
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