Journal article
Written informed consent and selection bias in observational studies using medical records: systematic review
Abstract
OBJECTIVES: To determine whether informed consent introduces selection bias in prospective observational studies using data from medical records, and consent rates for such studies.
DESIGN: Systematic review.
Authors
Kho ME; Duffett M; Willison DJ; Cook DJ; Brouwers MC
Journal
The BMJ, Vol. 338, No. mar12 2,
Publisher
BMJ
Publication Date
March 12, 2009
DOI
10.1136/bmj.b866
ISSN
0959-8138