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

Internet

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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