Journal article
Systematic review to determine whether participation in a trial influences outcome
Abstract
OBJECTIVE: To systematically compare the outcomes of participants in randomised controlled trials (RCTs) with those in comparable non-participants who received the same or similar treatment.
DATA SOURCES: Bibliographic databases, reference lists from eligible articles, medical journals, and study authors.
Authors
Vist GE; Hagen KB; Devereaux PJ; Bryant D; Kristoffersen DT; Oxman AD
Journal
The BMJ, Vol. 330, No. 7501,
Publisher
BMJ
Publication Date
May 21, 2005
DOI
10.1136/bmj.330.7501.1175
ISSN
0959-8138