Linked Life Data

17885869

Source:http://linkedlifedata.com/resource/pubmed/id/17885869

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2007-9-21
pubmed:abstractText
We propose a sample size calculation method for rank tests comparing two survival distributions under cluster randomization with possibly variable cluster sizes. Here, sample size refers to number of clusters. Our method is based on simulation procedure generating clustered exponential survival variables whose distribution is specified by the marginal hazard rate and the intracluster correlation coefficient. Sample size is calculated given significance level, power, marginal hazard rates (or median survival times) under the alternative hypothesis, intracluster correlation coefficient, accrual rate, follow-up period, and cluster size distribution.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
1054-3406
pubmed:author
pubmed:issnType
Print
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
839-49
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Sample size calculation for weighted rank tests comparing survival distributions under cluster randomization: a simulation method.
pubmed:affiliation
Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina 27705, USA. sinho.jung@duke.edu
pubmed:publicationType
Journal Article, Comparative Study