Empirical Evidence of Bias: Dimensions o
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Schulz, K. F.; Chalmers, I.; Hayes, R. J.; Altman, D. G.
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Article
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1995
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American Medical Association
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English
β 963 KB
Objective.\p=m-\To determine if inadequate approaches to randomized controlled trial design and execution are associated with evidence of bias in estimating treat- ment effects. Design.\p=m-\An observational study in which we assessed the methodological quality of 250 controlled trials from 33 meta