Linked Life Data

17908590

Source:http://linkedlifedata.com/resource/pubmed/id/17908590

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2007-10-2
pubmed:abstractText
Visual acuity (VA) is the primary outcome measure in many studies involving eye diseases. A standard statistical approach for comparing a continuous measurement such as a VA letter score between 2 treatment groups is to perform a t test comparing the means. However, frequently a binary variable is created from the continuous VA letter score based on whether or not there has been a worsening (or gain) of > or =15 letters (equivalent to > or =3 lines), and a chi square or similar statistical test is performed to compare the proportions of success (or failure) between groups. The purpose of this article is to contrast these 2 approaches.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1549-4713
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
114
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1804-9
pubmed:dateRevised
2008-7-15
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Visual acuity as an outcome measure in clinical trials of retinal diseases.
pubmed:affiliation
Jaeb Center for Health Research, Tampa, Florida 33647, USA.
pubmed:publicationType
Journal Article