Linked Life Data

12188589

Source:http://linkedlifedata.com/resource/pubmed/id/12188589

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2002-8-21
pubmed:abstractText
This paper presents the first estimates of school-level intraclass correlation (ICC) for smoking-related variables from an urban and largely African American population. Seventh graders (n = 6967) from 39 middle schools in Memphis, TN, were measured at baseline in 1994 and annually through 1997. Mixed model regression methods were used to estimate variance components for school and residual error. School-level ICCs were large enough, if ignored, to substantially inflate the Type I error rate in an analysis of treatment effects. We show how those correlations can be reduced using regression adjustments and used to determine sample size for future school-based smoking prevention studies.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
0306-4603
pubmed:author
pubmed:issnType
Print
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
509-27
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:articleTitle
Intraclass correlation among measures related to cigarette use by adolescents: estimates from an urban and largely African American cohort.
pubmed:affiliation
Department of Psychology, The University of Memphis, TN 38152-3230, USA. d.murray@mail.psyc.memphis.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.