Dietary Reference Intakes Applications in Dietary Assessment (2000) / Chapter Skim
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Appendix E: Units of Observation: Assessing Nutrient Adequacy Using Household and Population Data
Appendix E: Units of Observation: Assessing Nutrient Adequacy Using Household and Population Data
Pages 232-238
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From page 232... ...
That is, the analysis assumes that information is available on the usual intake of inclivicluals. For either the probability approach or Estimated Average Requirement (EAR)
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From page 233... ...
A major clistinction between assessing a particular household and assessing a population of households is that the population average household intake should be expected to approximate the population mean household energy requirement, thus the confidence associated with an assessment of the total group should be improved. Conversely, because of expected correlation between energy intakes and energy neecis at the household level, it is not possible to generate an unbiased estimate of the prevalence of inadequate intakes.
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From page 234... ...
With the use of current FAD/WHO nutrient and energy requirement estimates and the exclusion of pregnant women from the consideration, it turns out that this is often pubescent boys and girls or women of childbearing age. The calculation of required nutrient density is not as simple as computing the ratio of either the Estimated Average Requirement (EAR)
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From page 235... ...
Although this approach can resolve some of the major issues when clearing with populations of households, it has severe limitations and is not recommencleci for assessment of observed intake of specific households. A Caveat on Dietary Data Used for Househo;~-Teve;t Assessments Although it is not within the purview of this report to aciciress methodologies of food intake ciata collection, it is germane to warn about special issues to be consiclereci in assessing the suitability of ciata or in developing adjustments.
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From page 236... ...
Customary food balance sheets provide information on a country's food supply available for consumption cleriveci from calculations baseci on estimates of amounts of domestic food procluceci plus food imports and any change in food stocks since the previous reference period, and less food exports and food cliverteci to nonhuman sectors (e.g., animal feecis) or converted to other forms in processing (e.g., alcohol production or in North America the procluction of high fructose sweeteners)
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From page 237... ...
Per Capita Needs for Other Nutrients In theory, one could also assess per capita intake ciata for acloquacy of other nutrients at the population level. The approach would have to involve a first step of generating a per capita requirement probably baseci on an intermediate nutrient density approach as cliscusseci above for household intake ciata.
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From page 238... ...
238 DIETARY REFERENCE INTAKES In theory, then, an assessment of nutrient supply can be macle with the population as the unit of observation but it would require very careful thought in building an estimate of the appropriate reference population requirement.
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