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Cluster randomised trials in the medical literature: two bibliometric surveys
BACKGROUND: Several reviews of published cluster randomised trials have reported that about half did not take clustering into account in the analysis, which was thus incorrect and potentially misleading. In this paper I ask whether cluster randomised trials are increasing in both number and quality...
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| Formato: | Texto |
| Lenguaje: | English |
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BioMed Central
2004
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC515302/ https://www.ncbi.nlm.nih.gov/pubmed/15310402 http://dx.doi.org/10.1186/1471-2288-4-21 |