Linked Life Data

2343857

Source:http://linkedlifedata.com/resource/pubmed/id/2343857

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1990-6-28
pubmed:abstractText
In the 1984-1985 University of Michigan Food Frequency Study, 228 black and white men and women ages 24-51 years completed 16 days of food records over the course of a year and then completed a quantitative food frequency questionnaire. The relative validity of macronutrient (fat, protein, and carbohydrate) estimates from the questionnaire was evaluated with the records used as a standard. The two methods differed both in estimated group mean intake and in the relative ranking of individuals. Partitioning of between-method disagreement showed that frequency differences were the main source of poor agreement in relative ranking; serving size differences contributed mainly to disagreement in group mean intake; and differences in nutrient composition had only minor effects. After adjusting for total calorie intake, agreement in group mean intake improved. Agreement in relative ranking and classification also improved, but substantial disagreement remained. The strategy of adjusting for total calorie intake depends on the assumption that macronutrients are reported in similar proportions on both instruments. This assumption did not appear to hold true. Respondents showed considerable variability in the proportionality of reporting, with 46% of respondents reporting fat intake disproportionately. A summary index of proportionality is described and the relation between disproportionate reporting and misclassification is discussed. Disproportionate reporting of macronutrients limits the ability of food frequency questionnaires to rank individuals similarly to a reference method even if estimates are adjusted for total calorie intake.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0002-9262
pubmed:author
pubmed:issnType
Print
pubmed:volume
131
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1046-58
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Partitioning macronutrient intake estimates from a food frequency questionnaire.
pubmed:affiliation
Division of Health Examination Statistics, National Center for Health Statistics, Hyattsville, MD 20782.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, Non-P.H.S.