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Assessing observational studies of medical treatments
BACKGROUND: Previous studies have assessed the validity of the observational study design by comparing results of studies using this design to results from randomized controlled trials. The present study examined design features of observational studies that could have influenced these comparisons....
| Autores principales: | , , , , , , |
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| Formato: | Texto |
| Lenguaje: | English |
| Publicado: |
BioMed Central
2005
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1215501/ https://www.ncbi.nlm.nih.gov/pubmed/16137327 http://dx.doi.org/10.1186/1742-7622-2-8 |