What kind of controls to use in case con
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Hook, Ernest B.
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Article
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2000
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John Wiley and Sons
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English
⚖ 30 KB
👁 2 views
that are prospective non-case control. In the absence of random or at least nondifferential assignment of exposure, the possibility of undetected confounding due to association of exposure or defect with some uncontrolled variable complicates causal interpretation of the association of a birth defec