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Instrumental variables II: instrumental variable application—in 25 variations, the physician prescribing preference generally was strong and reduced covariate imbalance

OBJECTIVE: An instrumental variable (IV) is an unconfounded proxy for a study exposure that can be used to estimate a causal effect in the presence of unmeasured confounding. To provide reliably consistent estimates of effect, IVs should be both valid and reasonably strong. Physician prescribing pre...

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Bibliografiske detaljer
Main Authors: Rassen, Jeremy A., Brookhart, M. Alan, Glynn, Robert J., Mittleman, Murray A., Schneeweiss, Sebastian
Format: Artigo
Sprog:Inglês
Udgivet: 2009
Fag:
Online adgang:https://ncbi.nlm.nih.gov/pmc/articles/PMC2886011/
https://ncbi.nlm.nih.gov/pubmed/19345561
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1016/j.jclinepi.2008.12.006
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