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

BACKGROUND: 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. Pragmatic trials measure effectiveness; they measure the de...

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Pubblicato in:	BMC Med Res Methodol
Autori principali:	Godwin, Marshall, Ruhland, Lucia, Casson, Ian, MacDonald, Susan, Delva, Dianne, Birtwhistle, Richard, Lam, Miu, Seguin, Rachelle
Natura:	Artigo
Lingua:	Inglês
Pubblicazione:	BMC 2003
Soggetti:	Debate
Accesso online:	https://ncbi.nlm.nih.govhttps://pmc.ncbi.nlm.nih.gov/articles/PMC317298/ https://ncbi.nlm.nih.govhttps://pubmed.ncbi.nlm.nih.gov/14690550/ https://ncbi.nlm.nih.govhttps://doi.org/10.1186/1471-2288-3-28
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