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Target and actual sample sizes for studies from two trial registries from 1999 to 2020: an observational study

OBJECTIVES: To investigate differences between target and actual sample sizes, and what study characteristics were associated with sample sizes. DESIGN: Observational study. SETTING: The large trial registries of clinicaltrials.gov (starting in 1999) and ANZCTR (starting in 2005) through to 2021. PA...

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Detalles Bibliográficos
Autores principales:	Barnett, Adrian Gerard, Glasziou, Paul
Formato:	Online Artículo Texto
Lenguaje:	English
Publicado:	BMJ Publishing Group 2021
Materias:	Evidence Based Practice
Acceso en línea:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8719224/ http://dx.doi.org/10.1136/bmjopen-2021-053377

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