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COVID-19: underpowered randomised trials, or no randomised trials?
A recently published trial of face mask use to protect against COVID-19 demonstrated a key barrier to carrying out randomised trials in public health: the need for unattainably large sample sizes. For many public health interventions, the choice is not between sufficiently powered trials and underpo...
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
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BioMed Central
2021
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8006114/ https://www.ncbi.nlm.nih.gov/pubmed/33781304 http://dx.doi.org/10.1186/s13063-021-05209-5 |