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BMJ. 2000 Feb 19;320(7233):503-6.

Expressing the magnitude of adverse effects in case-control studies: "the number of patients needed to be treated for one additional patient to be harmed".

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  • 1Department of Epidemiology and Biostatistics, Faculty of Medicine, McGill University, Montreal, Canada H3A 1A2.
PMID:
10678870
[PubMed - indexed for MEDLINE]
PMCID:
PMC1127536
Free PMC Article
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