Linked Life Data

16755531

Source:http://linkedlifedata.com/resource/pubmed/id/16755531

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SubjectPredicateObjectContext
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pubmed-article:16755531pubmed:abstractTextMultiple informant data refers to information obtained from different individuals or sources used to measure the same construct; for example, researchers might collect information regarding child psychopathology from the child's teacher and the child's parent. Frequently, studies with multiple informants have incomplete observations; in some cases the missingness of informants is substantial. We introduce a Maximum Likelihood (ML) technique to fit models with multiple informants as predictors that permits missingness in the predictors as well as the response. We provide closed form solutions when possible and analytically compare the ML technique to the existing Generalized Estimating Equations (GEE) approach. We demonstrate that the ML approach can be used to compare the effect of the informants on response without standardizing the data. Simulations incorporating missingness show that ML is more efficient than the existing GEE method. In the presence of MCAR missing data, we find through a simulation study that the ML approach is robust to a relatively extreme departure from the normality assumption. We implement both methods in a study investigating the association between physical activity and obesity with activity measured using multiple informants (children and their mothers).lld:pubmed
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pubmed-article:16755531pubmed:authorpubmed-author:LairdNan MNMlld:pubmed
pubmed-article:16755531pubmed:authorpubmed-author:HortonNichola...lld:pubmed
pubmed-article:16755531pubmed:authorpubmed-author:HernándezBern...lld:pubmed
pubmed-article:16755531pubmed:authorpubmed-author:LitmanHeather...lld:pubmed
pubmed-article:16755531pubmed:copyrightInfoCopyright (c) 2006 John Wiley & Sons, Ltd.lld:pubmed
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pubmed-article:16755531pubmed:volume26lld:pubmed
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pubmed-article:16755531pubmed:pagination1055-68lld:pubmed
pubmed-article:16755531pubmed:dateRevised2011-9-26lld:pubmed
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pubmed-article:16755531pubmed:year2007lld:pubmed
pubmed-article:16755531pubmed:articleTitleIncorporating missingness for estimation of marginal regression models with multiple source predictors.lld:pubmed
pubmed-article:16755531pubmed:affiliationNew England Research Institutes, 9 Galen St, Watertown, MA 02472, USA. hlitman@neriscience.comlld:pubmed
pubmed-article:16755531pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:16755531pubmed:publicationTypeResearch Support, N.I.H., Extramurallld:pubmed
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