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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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| Main Authors: | , , , , |
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| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
BMJ Publishing Group Ltd.
2008
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC2600604/ https://ncbi.nlm.nih.gov/pubmed/19056791 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1136/bmj.a2299 |
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