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Discrepancies in sample size calculations and data analyses reported in randomised trials: comparison of publications with protocols

Objective To evaluate how often sample size calculations and methods of statistical analysis are pre-specified or changed in randomised trials. Design Retrospective cohort study. Data source Protocols and journal publications of published randomised parallel group trials initially approved in 1994-5...

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Detalles Bibliográficos
Autores principales:	Chan, An-Wen, Hróbjartsson, Asbjørn, Jørgensen, Karsten J, Gøtzsche, Peter C, Altman, Douglas G
Formato:	Texto
Lenguaje:	English
Publicado:	BMJ Publishing Group Ltd. 2008
Materias:	Research
Acceso en línea:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2600604/ https://www.ncbi.nlm.nih.gov/pubmed/19056791 http://dx.doi.org/10.1136/bmj.a2299

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