Linked Life Data

8369395

Source:http://linkedlifedata.com/resource/pubmed/id/8369395

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1993-10-13
pubmed:abstractText
Due to the occurrence of missing observations, longitudinal data are rarely balanced and complete. Weighted least squares analyses described by Grizzle, Starmer, and Koch (1969, Biometrics 25, 489-504) have been developed for the analysis of incomplete longitudinal categorical data [Stanish, Gillings, and Koch (1978, Biometrics 34, 305-317); Woolson and Clarke (1984, Journal of the Royal Statistical Society, Series A 147, 87-99)]. However, all these analyses have assumed that missing observations are missing completely at random in the sense of Rubin (1976, Biometrika 63, 581-592). When the occurrence of missing observations is related to the unobserved response values, these analyses may result in biased results. In this paper, we develop a simple and practical test of the missing mechanism in incomplete repeated categorical data. The proposed test is an extension of the test of Little (1988, Journal of the American Statistical Association 83, 1198-1202) and uses a test criterion given in general form by Wald. The test is illustrated using data from a longitudinal investigation of obesity in school-age children.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0006-341X
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
631-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
A test of the missing data mechanism for repeated categorical data.
pubmed:affiliation
Biometry and Mathematical Statistics Branch, National Institute of Child Health and Human Development, Bethesda, Maryland 20892.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.