Ontology highlight
ABSTRACT:
SUBMITTER: Piaggio G
PROVIDER: S-EPMC280677 | biostudies-literature | 2003 Oct
REPOSITORIES: biostudies-literature
BMC medical research methodology 20031003
<h4>Background</h4>The aim of this article is to explore ways in which selection bias and ascertainment bias can be reduced and investigated in trials, by using the example of a drug trial carried out in both developed and developing countries in hospital delivery wards.<h4>Methods</h4>We describe an innovative and practical design for the boxes for packing the drugs as a way of increasing the security of allocation concealment and blinding. We also assess ascertainment bias using sensitivity an ...[more]