Pragmatic controlled clinical trials in primary care: the struggle between external and internal validity

Pragmatic controlled clinical trials in primary care: the struggle between external and internal validity

<p>Abstract</p> <p>Background</p> <p>Controlled clinical trials of health care interventions are either explanatory or pragmatic. Explanatory trials test whether an intervention is efficacious; that is, whether it can have a beneficial effect in an ideal situation. Prag...

Full description

Bibliographic Details
Main Authors: Birtwhistle Richard, Delva Dianne, MacDonald Susan, Casson Ian, Ruhland Lucia, Godwin Marshall, Lam Miu, Seguin Rachelle
Format: Article
Language:English
Published: BMC 2003-12-01
Series:BMC Medical Research Methodology
Online Access:http://www.biomedcentral.com/1471-2288/3/28

Internet

http://www.biomedcentral.com/1471-2288/3/28

Similar Items