National Survey Data on Food Consumption Uses and Recommendations (1984) / Chapter Skim
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5 Conjoint Data Use: Committee Perspective
5 Conjoint Data Use: Committee Perspective
Pages 53-64
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From page 53... ...
The scope of this report is limited to recommendations for only a part of this nationwide food and nutrition monitoring: the food consumption and nutrient intake aspects of two national surveys, NFCS and NHANES . Data collection and reporting methods must meet the existing and future needs of users of each of the separate core survey data bases, although it is equally important that the data bases feeding information into the larger monitoring system meet monitoring system needs, as well.
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From page 54... ...
From this, estimates can be made of the nutrients in diets ingested by survey subjects -- adults and children who are stratified within the data bases by sex, age, and other descriptors. In addition, these surveys obtain information on various household characteristics, including factors that can contribute to assessment of the socioeconomic and demographic factors associated with food consumption and dietary status.
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From page 55... ...
Nutritional status is a health-related judgment based on measurements that directly or inferentially reflect the dynamic processes of food ingestion and digestion, the transport, absorption, and metabolism of food components and their products, and the excretion of non-used food components and metabol ic products . In contrast with the use of per capita disappearance data, the advantage of the conjoint use of NFCS and NHANES data bases for nationwide food and nutrition monitoring is that it allows information from separate data bases to be linked at the level of nonaggregated information.
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From page 56... ...
, their prevalence, and death from disease, as well as other information that contributes to the needs of a national monitoring system. However, none of these contributing data bases can substitute for the information obtained from the core survey (NFCS and NHANES)
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From page 57... ...
ELIMINATE DIETARY INTAKE DATA COLLECTION FROM ONE OF THE EXISTING SURVEYS Eliminating dietary data from the NFCS is tantamount to eliminating this survey ant losing the uses that require information collected only in the NFCS, such as extensive socioeconomic data, food purchasing data, data on seasonality, and replications . E1 iminating dietary data from the NHANES would reduce interview time by about 15%, but would not diminish NHANES cos ts proportionately, because NHANES fixes costs are high.
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From page 58... ...
Thus, NHANES data collection cannot be added to the NFCS. If NFCS data collection is imposed on the NHANES, if would substitute the NFCS dietary interview, adding 2 hours of dietary data collection to the present NHANES half-hour interview and thus make the NHANES a 5-hour process.
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From page 59... ...
surveys and to nationwide food and nutrition monitoring were the basis for the Committee's assessment of the highest priority options for modifying the existing surveys. In the view of the Committee, an improved data collection system is needed to ensure the effective use of the separate survey data bases that are needed for a system of nationwide food and nutrition monitoring.
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From page 60... ...
Comparable and compatible (linked) data from the separate core survey data bases provide the information needed to assess the foodand nutritionrelated risks to health that may be amenable to intervention and to assist in selecting from among possible intervention options.
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From page 61... ...
— 61 — ~ ~ 1 · ~ c ~ o O AL ~ a` ~ t.'b A A :~- ~ -= ° ~ ~ ~ e Liz e: ~ s 4!
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From page 62... ...
of concern through use of dietary data / i NHANES -- Corroboration of observations by use of biochemical measures if appropriate measurements can be identified and sample is large enough ~ -- whether to l NFCS -- Selection from tag iOceC~e~C Ian alternatives | Education · Fortification 0 Food distribution programs ~ Regulation NFCS -- Monitoring trends; through succes ~ ive surveys NHANES -- Monitoring trends through successive surveys .)
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From page 63... ...
with dietary data 1 1 DECISION -- whether ~ to intervene NFCS -- Selection from among intervention alternatives · Education · Fortif ication · Foot assistance programs · Regulation NFCS -- Monitoring trends ~ I ~ NHANES -- Monitoring bents through successive through successive surveys surveys ~ .
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